LabSen Premium pH Electrodes

LabSen221 Precise pH Electrode

LabSen241-6 Semi-micro pH Electrode

LabSen241-3 Micro pH Electrode

LabSen251 Glass Spear pH Electrode

LabSen551 Plastic Spear pH Electrode

LabSen371 Precise pH Electrode

LabSen801 Pure Water pH Electrode

LabSen831 HF pH Electrode

LabSen851-1 Glass Spear pH Electrode

LabSen211 pH Electrode

LabSen 231 Glass-body pH Electrode for Wastewater, Suspension, Emulsion by Apera

Backed by proprietary Swiss sensor technology and materials, the LabSen 231 Combination pH Electrode is ideal for testing emulsion, suspension, wastewater, and samples containing protein and sulfide. Its 2-pore double junction structure and solid electrolyte make it hard to be contaminated and highly resistant to compression.

• Long-Life Reference System - The LabSen 231 pH electrode adopts a long-life reference system, which is composed of a glass tube, AgCl and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of reference electrode and extends the service life of the electrode.
• Polymer Electrolyte - The polymer electrolyte is in direct contact with test samples. The anti-pressure capacity can reach up to 6 bars, making it ideal for testing suspension and wastewater.
• Special Glass Membrane - The LabSen 231 pH electrode adopts a hemispherical glass membrane, which is highly resistant to general impact (the traditional glass bulb membrane is a lot more fragile), and can be tested in high-temperature samples (up to 176°F).

LabSen 331 POM-body pH Electrode for Wastewater Treatment by Apera

Backed by proprietary Swiss sensor technology and materials, the LabSen® 331 POM Combination pH Electrode is designed for testing wastewater, emulsion, suspension, and samples containing protein and sulfide.

LabSen unique blue hemispherical glass membrane - faster response time, better repeatability, and built tough, highly resistant to general impact (totally differentiates from the traditional fragile glass bulb membrane).

Polymer Electrolyte - The solid polymer electrolyte is in direct contact with test samples. The anti-pressure capacity can reach up to 6 bars, making it ideal for testing suspension and wastewater. No more frustrating clogged junctions.

Long-Life Reference System - The LabSen 331 pH electrode adopts a long-life reference system, which is composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of reference electrode and extends the service life of the electrode.

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors, such as Apera Instruments MP511, PH850, PH8500, PH700, PH910, PH950, PH820 and PC820. The temperature sensor is not built-in. Users need to have a separate temperature probe (ex: Apera Instruments MP500) to enable ATC or manually input temperature to realize temperature compensation.

The electrode is backed up with a 6-month warranty by Apera Instruments.

• Proprietary pH sensor technology and materials from Switzerland
• Unique LabSen® blue glass membrane, faster response rate, better repeatability, and impact-resistant
• Polymer Electrolyte, ideal for testing wastewater and suspension. No more clogged junction
• Long-Life Reference System, improving the stability of reference electrode and prolong the service life of the electrode
• POM housing, highly resistant to corrosions

LabSen 821 Glass-body pH Electrode for Dairy Products and Liquid Food by Apera

Backed by proprietary Swiss sensor technologies and materials, the LabSen® 821 Combination pH Electrode/Probe is designed for testing the pH for dairy products such as milk, cream, yogurt, and other liquid food such as mayonnaise, jam, BBQ sauce, syrup, etc.

Silver Ion Trap Reference System+Protelyte Electrolyte - The LabSen® 821 pH Electrode/Probe adopts a Silver Ion Trap reference system and Protelyte reference solution. On top of the Long-Life reference system, a silver ion trap is added to prevent the junction from being blocked or contaminated by proteins.

LabSen unique blue hemispherical glass membrane - faster response time, better repeatability, and built tough, highly resistant to general impact (totally differentiates from the traditional fragile glass bulb membrane); and can be tested in high-temperature samples (up to 225°F).

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors, such as Apera Instruments MP511, PH850, PH8500, PH700, PH910, PH950, PH820 and PC820. The temperature sensor is not built-in. Users need to have a separate temperature probe (ex: Apera Instruments MP500) to enable ATC or manually input temperature to realize temperature compensation.

The electrode is backed up with a 6-month warranty by Apera Instruments.

• Proprietary pH sensor technology and materials from Switzerland
• Designed for milk and other liquid food that contain proteins
• Unique LabSen® hemispherical glass membrane, which has a faster response rate, better repeatability, and built tough
• Silver Ion Trap Reference System + Protelyte reference solution, preventing the electrode being contaminated by proteins
• Standard BNC Connector

LabSen 841 Glass-body pH Electrode for Strong Base Solutions by Apera

Backed by proprietary Swiss sensor technology and materials, the LabSen® 841 Glass Combination pH Electrode/Probe is designed for pH measurements for strong base solutions (10-14 pH).

Special Glass Membrane - The LabSen 841 pH Electrode/Probe adopts a special H glass membrane, which has better accuracy and repeatability in strong base solutions; the hemispherical sensor is also built tough and highly resistant to general impact (completely different from the traditional fragile glass bulb membrane).

Silver Ion Trap Reference System - The LabSen 841 pH Electrode/Probe adopts a Silver Ion Trap reference system. On top of the Long-Life reference system, a silver ion trap is added to prevent the junction from being blocked by silver sulfide.

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors, such as Apera Instruments MP511, PH850, PH8500, PH700, PH800, PC800, PH820 and PC820. The temperature sensor is not built-in. Users need to have a separate temperature probe (ex: Apera Instruments MP500) to enable ATC or manually input temperature to realize temperature compensation.

The electrode is backed up with a 6-month warranty by Apera Instruments.

• Proprietary pH sensor technology and materials from Switzerland
• Unique LabSen® H glass membrane, which has a faster response rate, better repeatability in strong base solutions (10-14 pH)
• Silver Ion Trap Reference System - On top of the Long-Life reference system, a silver ion trap is added to prevent the junction being blocked by silver sulfide
• Standard BNC Connector
• 6-Month Warranty fulfilled by Apera Instruments

LabSen 851-3 Glass-body pH Electrode for Highly Viscous Solutions by Apera

Backed by proprietary Swiss sensor technology and materials, the LabSen 851-3 Glass Pre-Pressurized Combination pH Electrode is designed for pH measurement for highly viscous solutions such as cosmetics, paint, resin, glue, and etc.

Pre-pressurized reference system - a pressure is pre-filled inside the LabSen 851-3 electrode so that the electrolyte can continue to flow through the junction. Even if a high viscous solution is tested, the blockage of the junction can also be avoided

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors, such as Apera Instruments MP511, SX811, PH700, PH800, PC800, PH820 and PC820. The temperature sensor is not built-in. Users need to have a separate temperature probe (ex: Apera Instruments MP500) to enable ATC or manually input temperature to realize temperature compensation.

The electrode is backed up with a 6-month warranty by Apera Instruments

• Proprietary pH sensor technology and materials from Switzerland
• Pre-pressurized reference system: pressure is pre-filled inside the electrode so that the electrolyte can continue to flow through the junction. Even if a high viscous solution is tested, the blockage of the junction can also be avoided
• Standard BNC Connector
• 6-Month Warranty fulfilled by Apera Instruments

LabSen 881 Glass-body pH Electrode for Low Temperature Solutions by Apera

Backed by proprietary Swiss sensor technology and materials, the LabSen® 881 Glass Combination pH Electrode is ideal for pH measurements for low-temperature solutions (down to -22 °F).

Special Glass Membrane - The LabSen 881 pH electrode adopts a low-impedance glass membrane, which is especially suitable for low-temperature sample testing. The conical sensor tip is highly resistant to general impact (completely different from the traditional fragile glass bulb sensor), and has a faster response rate and better repeatability.

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors, such as Apera Instruments MP511, PH8500, PH850, PH700, PH800, PC800, PH820, and PC820. The temperature sensor is not built-in. Users need to have a separate temperature probe (ex: Apera Instruments MP500) to enable ATC or manually input temperature to realize temperature compensation.

The electrode is backed up with a 6-month warranty by Apera Instruments.

• Proprietary pH sensor technology and materials from Switzerland
• A special low-impedance glass membrane is adopted, which is especially suitable for low-temperature sample testing
• LabSen conical sensor tip - fast response rate, high repeatability, and built tough
• Standard BNC Connector
• 6-Month Warranty fulfilled by Apera Instruments

LabSen 213 Glass Combination pH/Temp. Electrode for General Water Solutions (TRIS compatible) by Apera

Backed by proprietary Swiss sensor technology and materials, the Apera Instruments LabSen® 213 Glass 3-in-1 pH/Temp. Electrode is designed for general water solutions in scientific research and quality control. This electrode is compatible with TRIS buffer solutions.

LabSen® unique blue hemispherical glass membrane - faster response time, better repeatability, and built tough, highly resistant to general impact (totally differentiates from the traditional fragile glass bulb membrane); and can be tested in high-temperature samples (up to 225°F).

Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of the reference electrode and extends the service life of the electrode.

The patented pH/Temperature combination structure - The temperature element is placed in an independent cavity under the pH glass membrane. With the built-in heat-conducting medium, the temperature sensing speed can be increased by 40%, hence the response time and stability of the pH electrode are greatly improved.

Compatible Apera Instruments' meters: PH700, SX823-B, MP511, PH910, PH950, PH850, PH8500, PH820. May NOT work with other brands' meters because the temperature unit might be incompatible.

The electrode is backed up with a 6-month warranty fulfilled by Apera Instruments.

• Proprietary pH sensor technology and materials from Switzerland
• Unique LabSen® blue hemispherical glass membrane - fast response rate and impact-resistant
• Patented pH/Temperature combination structure, increasing the temperature response time by 40% compared to a conventional isolated built-in thermistor
• Say goodbye to air bubbles inside the bulb thanks to the Swiss blue inner gel solution.
• Long-Life Reference System, improving the stability of the reference electrode and prolong the service life of the electrode

LabSen 223 Glass Combination pH/Temp. Electrode for Viscous and Low Ion Concentration Samples by Apera

Backed by proprietary Swiss sensor technology and materials, LabSen® 223 Glass Combination pH/Temp. Electrode is designed for viscous and low ion concentration samples' pH testing and ideal for titration. The electrode is compatible with TRIS buffer solutions.

The electrode is backed up with a 6-month warranty by Apera Instruments.

• Moveable Sleeve Junction - easy to clean, especially suitable for low ion concentration solution and non-aqueous solution. The infiltration rate of the electrolyte is determined by the tightness of the sleeve during installation.
• Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of reference electrode and extends the service life of the electrode.
• Special Glass Membrane - The Cylindrical glass membrane is highly resistant to general impact (the traditional glass bulb membrane is a lot more fragile), and can be tested in high-temperature samples (up to 176°F).
• Built-in temperature sensor for Automatic Temperature Compensation

LabSen 333 POM Combination pH/Temp. Electrode for Wastewater Treatment by Apera

Backed by proprietary Swiss pH sensor technology and materials, the LabSen® 333 3-in-1 pH/Temp. The electrode is temperature compensated pH electrode and is designed for testing wastewater, emulsion, suspension, and samples containing protein and sulfide (This is a replacement probe for Apera Instruments SX811-WW Portable pH Meter for Wastewater).

LabSen unique blue hemispherical glass membrane - faster response time, better repeatability, and built tough, highly resistant to general impact (totally differentiates from the fragile conventional glass bulb membrane).

Long-Life Reference System - The LabSen 333 pH electrode adopts a long-life reference system, which is composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of reference electrode and extends the service life of the electrode.

Polymer Electrolyte - The solid polymer electrolyte is in direct contact with test samples. The anti-pressure capacity can reach up to 6 bars, making it ideal for testing suspension and wastewater. No more frustrating clogged junctions.

Compatible with Apera Instruments' meters such as PH700, SX823-B, MP511, PH800, PC800. May NOT work with other brands' meters because the temperature unit might be incompatible.

The electrode is backed up with a 6-month warranty fulfilled by Apera Instruments.

• Unique LabSen blue glass membrane from Switzerland, faster response rate, better repeatability, and impact-resistant
• Polymer Electrolyte, ideal for testing wastewater and suspension. No more clogged junction.
• Long-Life Reference System, improving the stability of reference electrode and prolong the service life of the electrode
• POM housing, highly resistant to corrosions

LabSen 803 Glass Combination pH/Temp. Electrode for Purified Water & Low Ion-Concentration Solutions by Apera

Backed by proprietary Swiss sensor technology and materials, the LabSen® 803 3-in-1 pH/Temp. Electrode/Probe is designed for purified water such as drinking water, RO water, distilled water, deionized water, and other low ion-concentration solutions.

Moveable Sleeve Junction - The LabSen 803 pH Electrode/Probe is easy to clean, especially suitable for low ion concentration solutions. The infiltration rate of the electrolyte is determined by the tightness of the sleeve, which can be customized by users to ensure the best performance in every specific sample.

Silver Ion Trap Reference System - The LabSen 803 pH electrode adopts a Silver Ion Trap reference system. On top of the Long-Life reference system, a silver ion trap is added to prevent the junction being blocked by silver sulfide.

Unique Glass Membrane - The LabSen 803 pH Electrode/Probe adopts a Cylindrical glass membrane, which has faster response rate, better repeatability, and built tough - highly resistant to general impact (totally differentiates from the traditional fragile glass bulb membrane).

Patented pH/Temperature combination structure - The temperature element is placed in an independent cavity under the pH glass membrane. With the built-in heat-conducting medium, the temperature sensing speed can be increased by 40%, hence the response time and stability of the pH electrode are greatly improved.

Compatible Apera Instruments' meters: MP511, PH850, PH8500, SX823-B, PH700, PH910, PH950, PH820 and PC820. May NOT work with other brands' meters because the temperature unit might be incompatible.

The electrode is backed up with a 6-month warranty by Apera Instruments.

• Proprietary pH sensor technology and materials from Switzerland
• Unique LabSen cylindrical glass membrane, faster response rate, better repeatability in purified water
• Get stable pH measurements in purified water or low ion-concentration solutions in 30 seconds on average. Say goodbye to annoying fluctuations
• Patented pH/Temperature combination structure, increasing the temperature response time by 40% compared to a conventional isolated built-in thermistor
• Silver Ion Trap Reference System - on top of the Long-Life reference system, a silver ion trap is added to prevent the junction being blocked by silver sulfide

LabSen 553 Plastic Combination Spear pH/Temp. Electrode by Apera

Backed by proprietary Swiss sensor technology and materials, the LabSen® 553 3-in-1 pH/Temp. Spear Electrode/Sensor/Tester is designed for testing soil directly (This is a replacement probe for Apera PH850-SL, PH9500-SL).

Long-Life Reference System - The LabSen 553 pH electrode adopts a long-life reference system, which is composed of a glass tube, AgCl and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of reference electrode and extends the service life of the electrode.

Polymer Electrolyte - The solid polymer electrolyte makes the electrode hard to be contaminated and maintenance-free.

Special Glass Membrane - The LabSen 553 pH electrode adopts a spear sensor tip, which is ideal for directly testing semi-solid samples like soil.

Compatible Apera Instruments' meters: PH700, SX823-B, MP511, PH800, PC800. May NOT work with other brands' meters because the temperature unit might be incompatible. The electrode is backed up with a 6-month warranty by Apera Instruments.

• Proprietary pH sensor technology and materials from Switzerland
• Special LabSen Spear pH sensor tip, ideal for direct soil pH testing. No more slurry making.
• Pom housing, ideal for use in harsh environments
• Polymer electrolyte - not more clogged junction
• Long-life reference system, improving the stability of reference electrode and prolong the service life of the electrode

LabSen 823 Glass Combination pH/Temp. Electrode for Dairy Products and Liquid Food by Apera

Backed by proprietary Swiss sensor technologies and materials, the LabSen® 823 Glass Combination pH/Temperature Electrode/Probe is designed for testing pH for dairy products such as milk, cream, yogurt, and other liquid food such as mayonnaise, jam, BBQ sauce, syrup, etc.

Silver Ion Trap Reference System+Protelyte Electrolyte - The LabSen 823 pH/Temperature Electrode/Probe adopts a Silver Ion Trap reference system and Protelyte reference solution. On top of the Long-Life reference system, a silver ion trap is added to prevent the junction from being blocked or contaminated by proteins.

LabSen unique blue hemispherical glass membrane - faster response time, better repeatability, and built tough, highly resistant to general impact (totally differentiates from the traditional fragile glass bulb membrane); and can be tested in high-temperature samples (up to 225°F).

Patented pH/Temperature combination structure - The temperature element is placed in an independent cavity under the pH glass membrane. With the built-in heat conducting medium, the temperature sensing speed can be increased by 40%, hence the response time and stability of the pH electrode are greatly improved.

Compatible with Apera Instruments' meters such as PH700, SX823-B, MP511, PH800, and PC800. May NOT work with other brands' meters because the temperature unit might be incompatible.

The electrode is backed up with a 6-month warranty by Apera Instruments.

• Proprietary pH sensor technology and materials from Switzerland
• Designed for milk and other liquid food that contain proteins
• Silver Ion Trap Reference System + Protelyte reference solution, preventing the electrode from being contaminated by proteins
• Patented pH/Temperature combination structure, increasing the temperature response time by 40% compared to a conventional isolated built-in thermistor
• Unique LabSen hemispherical glass membrane, which has a faster response rate, better repeatability, and built tough

LabSen 243-6 Glass Combination pH/Temp. Electrode for Small Samples (>0.2mL) by Apera

Backed by proprietary Swiss pH sensor technology and materials, LabSen® 243-6 Glass pH/Temp. Electrode is designed for semi-micro samples (≥0.2ml). It is the default electrode for PH850-MS and PH8500-MS.

Unique Glass Membrane - LabSen® 243-6 pH electrode adopts a semi-micro cylindrical glass membrane (6mm in diameter), making small-sample pH testing easier than ever, and can be tested in high-temperature samples (up to 212°F).

Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of the reference electrode and extends the service life of the electrode.

The electrode uses a BNC/RCA connector, compatible with any pH meters that use BNC connectors and a 30KΩ thermistor.

The electrode is backed up with a 6-month warranty by Apera Instruments.

• Special LabSen® semi-micro cylindrical sensor tip, suitable for small-volume pH measurement (>0.2mL)
• Built-in temperature sensor (30K? thermistor)
• BNC/RCA-Connector
• 6-Month Warranty

AI3101 LabSen 211 Glass-body pH Electrode for General Water Solutions (TRIS compatible) by Apera

Built with proprietary sensor technology and materials from Switzerland, Apera LabSen 211 pH Electrode is ideal for professional lab and field pH measurement of general water solutions.

LabSen S-type hemispherical glass membrane - low resistance and high firmness, rendering fully stabilized readings in 15 to 30 seconds, and is yet 10 times stronger than traditional glass membranes, highly resistant to general impact, eliminating the chance of accidental breakage.

Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of reference electrode and extends the service life of the electrode.

The electrode uses a standard BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera MP500) to enable ATC or manually input temperature to achieve temperature compensation.

• Proprietary sensor technology and premium materials from Switzerland
• Built with LabSen S-type hemispherical glass membrane, featuring low resistance (fast response) and high firmness
• No more air bubbles inside the glass membrane thanks to the Swiss blue gel electrolyte.
• Long-Life Reference System improves the stability of reference electrode and extends the service life of the electrode
• Compatible with TRIS buffers

AI3102 LabSen 221 Glass-body pH Electrode for Viscous and Low Ion Concentration Samples by Apera

Built with proprietary sensor technology and premium materials from Switzerland, Apera LabSen 221 Glass-body pH Electrode is designed for titration and low ionic strength solutions as well as general water solutions. The electrode is compatible with TRIS buffer solutions.

LabSen S-type cylindrical glass membrane - low resistance and high firmness, rendering fully stabilized readings in 15 to 30 seconds, and is yet 10 times stronger than traditional glass membranes, highly resistant to general impact, eliminating the chance of accidental breakage.

Movable Sleeve Junction - easy to clean, especially suitable for low ionic strength solutions, emulsions, and suspensions. The infiltration rate of the electrolyte can be adjusted by the tightness of the sleeve.

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera Instruments MP500) to enable ATC or manually input temperature to realize temperature compensation.

• Built with LabSen S-type glass membrane, featuring fast response and high firmness
• Movable Sleeve Junction - easy to clean, adjustable infiltration rate
• Long-Life Reference System, improving the stability of the reference and extends the electrode's service life
• No more air bubbles inside the glass membrane thanks to the Swiss blue gel electrolyte.

AI3107 LabSen 371 PVC-body Flat pH Electrode by Apera

Built with proprietary sensor technology and premium materials, Apera LabSen 371 POM-body pH Electrode is designed for flat surface pH measurement such as skin, paper, textiles, etc.

Special Flat Glass Membrane - LabSen 371 pH electrode adopts a flat glass membrane with PTFE ring junction, making reliable surface pH test easier than ever.

Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of reference system and extends the service life of the electrode.

The electrode uses a standard BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera Instruments MP500) to enable ATC or manually input temperature to realize temperature compensation.

• Proprietary pH sensor technology and premium materials from Switzerland
• Special LabSen flat glass membrane, suitable for flat surface pH measurement such as skin, textiles, paper, etc.
• Long-Life Reference System, improving the stability of reference electrode and prolong the service life of the electrode
• Anti-clogging PTFE ring junction
• No more air bubbles inside the glass membrane thanks to the Swiss blue gel electrolyte.

AI3103 LabSen 241-6 Glass-body pH Electrode for Small Samples (>0.2mL) by Apera

Built with proprietary sensor technology and premium materials from Switzerland, LabSen 241-6 Glass-body Semi-Micro pH Electrode is designed for test tubes and small-volume samples (>0.2mL).

LabSen S-type semi-micro glass membrane - 100mm in length and 6mm in diameter, low membrane resistance (<350MΩ), making reliable small-volume (>0.2mL) pH measurement easier than ever, and can be tested in high-temperature samples (up to 212°F).

Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of the reference system and extends the electrode's service life.

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera Instruments MP500) to enable ATC or manually input temperature to achieve temperature compensation.

• Proprietary pH sensor technology and premium materials from Switzerland
• Low-resistance LabSen semi-micro cylindrical glass membrane, suitable for test tubes and small samples (>0.2mL)
• Smallest test volume is 60µL with the use of the semi-micro container (sold separately)
• Long-Life Reference System, improving the stability of the reference and extends the electrode's service life
• No more air bubbles inside the glass membrane thanks to the Swiss blue gel electrolyte.

AI3104 LabSen 241-3 Glass-body pH Electrode for Micro Samples (>30 microliters) by Apera

Backed by proprietary Swiss sensor technology and premium materials, LabSen 241-3 Glass Micro pH Electrode is designed for micro-volume samples (≥30 microliters), especially suitable for microplates, microcentrifuge, and microbiological samples. With the ultra-micro container (sold separately), it can test as low as 15 microliters.

Unique Glass Membrane - LabSen 241-3 pH electrode adopts a micro cylindrical sensor tip (top end ø3mm, stainless steel ø4mm), making micro-sample pH testing easier than ever, and can be tested in high-temperature samples (up to 212°F). The stainless steel protective shaft ø4mm) ensures the durability of the slim glass tube.

Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of the reference system and extends the electrode's service life.

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera Instruments MP500) to enable ATC or manually input temperature to achieve temperature compensation.

• Proprietary pH sensor technology and premium materials from Switzerland
• Low-resistance LabSen® micro cylindrical glass membrane, suitable for micro-volume pH measurement (>30 microliters)
• The stainless steel protective shaft ensures the durability of the slim glass tube
• Long-Life Reference System, improving the stability of the reference and extends the electrode's service life
• With the micro container (sold separately), it can test as low as 15 microliters.

AI3151 LabSen 241-3SP Glass-body Micro pH Electrode for Micro-Volume Solutions Containing Proteins by Apera

Backed by proprietary Swiss sensor technology and premium materials, LabSen 241-3SP Glass Micro pH Electrode is designed for micro-volume samples (≥30 microliters) containing proteins such as serum and microbiological samples. With the ultra-micro container (sold separately), it can test as low as 15 microliters.

Unique Glass Membrane – LabSen 241-3SP pH electrode adopts a micro cylindrical sensor tip (top end ø3mm, stainless steel ø4mm), making micro-sample pH testing easier than ever, and can be tested in high-temperature samples (up to 212°F). The stainless steel protective shaft ø4mm) ensures the durability of the slim glass tube.

Protelyte electrolyte – A specialized oily reference solution made for protein solutions and viscous samples.

Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of the reference system and extends the electrode's service life.

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera Instruments MP500) to enable ATC or manually input temperature to achieve temperature compensation.

• Proprietary pH sensor technology and premium materials from Switzerland
• Low-resistance LabSen® micro cylindrical glass membrane, suitable for micro-volume pH measurement (>30 microliters)
• Protelyte electrolyte made for protein-containing solutions such as serum and microbiological samples.
• The stainless steel protective shaft ensures the durability of the slim glass tube
• Long-Life Reference System, improving the stability of the reference and extends the electrode's service life
• With the micro container (sold separately), it can test as low as 15 microliters.

AI3161 LabSen 241-180 Glass-body pH Electrode for NMR Tubes (3mm diameter, 180mm length) by Apera

Built with proprietary sensor technology and premium materials from Switzerland, Apera LabSen 241-180 Glass Micro pH Electrode is designed for micro-volume samples in slim containers such as NMR tubes (minimum sample volume: 50 microliters).

LabSen Glass Membrane - LabSen 241-180 pH electrode adopts an ultra-long 180mm micro cylindrical glass membrane (ø3mm), making NMR tube pH measurement easier than ever. And it can be tested at high-temperature up to 212°F. The low-resistance membrane (<450MΩ) helps you quickly get a fully stabilized reading.

Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of the reference system and extends the electrode's service life.

The electrode uses a standard BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera Instruments MP500) to enable ATC or manually input temperature to achieve temperature compensation.

• Proprietary pH sensor technology and premium materials from Switzerland
• Low-resistance LabSen® 180mm*&oslah;3mm micro cylindrical glass membrane, ideal for NMR tubes and other slim containers (minimum sample volume: 50 microliters)
• Long-Life Reference System, improving the stability of the reference and extends the electrode's service life

AI3105 LabSen 251 Glass-body Spear pH Electrode for Semi-Solid Samples by Apera

Built with proprietary sensor technology and premium materials from Switzerland, Apera LabSen 251 Glass-body pH Electrode is designed for direct pH test of semi-solid samples as well as general water solutions.

LabSen S-type spear glass membrane - low resistance and high firmness, rendering fully stabilized readings in 15 to 30 seconds, and is yet 10 times stronger than traditional glass membranes, highly resistant to general impact, eliminating the chance of accidental breakage when inserting into semi-solid samples.

Open&Ceramic double-junction with Polymer electrolyte - ensures full contact with test samples while minimizing junction clogs. No need to refill electrolyte.

Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of reference electrode and extends the service life of the electrode.

The electrode uses a standard BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera MP500) to enable ATC or manually input temperature to achieve temperature compensation.

• Spear sensor designed for direct pH test of semi-solid samples
• LabSen S-type glass membrane, featuring fast response and high firmness
• Open&Ceramic double-junction with Polymer electrolyte
• Long-Life Reference System - improves the stability of the reference and extends the electrode's service life

AI3106 LabSen 551 PVC-body Spear pH Electrode by Apera

Built with proprietary sensor technology and premium materials from Switzerland, Apera LabSen 551 PVC-body pH Electrode is designed for direct soil testing and soil slurry testing.

LabSen S-type spear glass membrane - low resistance and high firmness, rendering fully stabilized readings in 15 to 30 seconds, and is yet 10 times stronger than traditional glass membranes, highly resistant to general impact, eliminating the chance of accidental breakage when inserting into the soil.

Open&Ceramic double-junction with Polymer electrolyte - ensures full contact with test samples while minimizing junction clogs. No need to refill electrolyte.

Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of the reference system and extends the service life of the electrode.

The electrode uses a standard BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera MP500) to enable ATC or manually input temperature to achieve temperature compensation.

• Spear sensor designed for direct soil pH test and soil slurry test
• LabSen S-type glass membrane, featuring fast response and high firmness
• Open&Ceramic double-junction with Polymer electrolyte
• Long-Life Reference System - improves the stability of the reference and extends the electrode's service life

AI3157 LabSen 751 Stainless Steel Spear pH Electrode for Solid Food Samples by Apera

Built with proprietary sensor technology and premium materials from Switzerland, Apera LabSen 751 Titanium-body pH Electrode is designed for food samples such as cheese, fruits, dough, sushi rice, and meat products.

LabSen S-type spear glass membrane - low resistance and high firmness, rendering fully stabilized readings in 15 to 30 seconds, and is yet 10 times stronger than traditional glass membranes, highly resistant to general impact, eliminating the chance of accidental breakage when inserting into food samples.

Open&Ceramic double-junction with Polymer electrolyte - ensures full contact with test samples while minimizing junction clogs. No need to refill electrolytes.

Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of reference electrode and extends the service life of the electrode.

The electrode uses a standard BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera MP500) to enable ATC or manually input temperature to achieve temperature compensation.

• Spear sensor designed for direct pH test of food samples such as cheese, fruits, dough, sushi rice, and meat products
• LabSen S-type glass membrane, featuring fast response and high firmness
• Open&Ceramic double-junction with Polymer electrolyte
• Long-Life Reference System - improves the stability of the reference and extends the electrode's service life

AI3159 LabSen 761 Stainless Steel Blade Spear pH Electrode for Meat by Apera

Built with proprietary sensor technology and premium materials from Switzerland, Apera LabSen 761 Titanium-body Blade Spear pH Electrode is designed for direct pH test of meats.

LabSen S-type spear glass membrane - low resistance and high firmness, rendering fully stabilized readings in 15 to 30 seconds, and is yet 10 times stronger than traditional glass membranes, highly resistant to general impact, eliminating the chance of accidental breakage when cutting through meat samples.

Open&Ceramic double-junction with Polymer electrolyte - ensures full contact with test samples while minimizing junction clogs. No need to refill electrolyte.

Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of reference electrode and extends the service life of the electrode.

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera Instruments MP500) to enable ATC or manually input temperature to achieve temperature compensation.

• Blade spear sensor designed for direct pH test of meats
• LabSen S-type glass membrane, featuring fast response and high firmness
• Open&Ceramic double-junction with Polymer electrolyte
• Long-Life Reference System - improves the stability of the reference and extends the electrode's service life
• Built-in temperature sensor for ATC

AI3108 LabSen 801 Glass-body pH Electrode for Purified Water& Low Ion-Concentration Solutions by Apera

Built with proprietary sensor technology and premium materials from Switzerland, Apera LabSen 801 Glass-body pH Electrode is made for pH measurements of pure water such as distilled and deionized water, and other low ion concentration solutions.

LabSen L-type glass membrane - fast response in low ionic strength solutions thanks to its ultra-low resistance formula (>50M&Omega), providing fully stabilized readings in 30 to 60 seconds.

Movable Sleeve Junction - easy to clean, especially suitable for low ionic strength solutions, emulsions, and suspensions. The infiltration rate of the electrolyte can be adjusted by the tightness of the sleeve.

Silver Ion Trap Reference System - On top of the Long-Life reference system, a silver ion trap is added to further prevent junction clog.

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera Instruments MP500) to enable ATC or manually input temperature to realize temperature compensation.

• Proprietary sensor technology and premium materials from Switzerland
• Built with LabSen L-type glass membrane for low ionic strength solutions
• Movable Sleeve Junction - easy to clean, adjustable infiltration rate
• No more air bubbles inside the glass membrane thanks to the Swiss blue gel electrolyte.
• Silver ion trap reference system

AI3109 LabSen 831 Glass-body pH Electrode for Strong Acid Samples and HF (Hydrofluoric) Acid by Apera

Built with proprietary sensor technology and premium materials from Switzerland, Apera LabSen 831 HF pH Electrode is designed for professional pH measurement of solutions containing HF (Hydrofluoric) acid, and other strong acidic solutions.

LabSen HF glass membrane - designed for accurate measurement in strong acid samples, and is resistant to hydrofluoric corrosion, good for 1000 times of measurement (measurement time<1 minute, and HF concentration should be less than 0.1mol/L or 0.2% wt%)

Built tough - The hemispherical glass membrane is 10 times stronger than traditional glass membranes, and highly resistant to general impact, saving the electrode from accidental damage.

Silver Ion Trap Reference System - On top of the Long-Life reference system, a silver ion trap is added to further prevent junction clogs.

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera MP500) to enable ATC or manually input temperature to realize temperature compensation.

• Proprietary pH sensor technology and premium materials from Switzerland
• LabSen HF glass membrane designed for accurate measurement in strong acid samples, and is resistant to hydrofluoric corrosion
• Silver Ion Trap Reference System
• LabSen's sturdy glass membrane is 10 times stronger than traditional glass membranes
• The blue gel electrolyte eliminates the chance of any air bubbles inside the sensor

AI3110 LabSen 851-1 Glass-body pH Electrode for Viscous Solutions by Apera

Built with proprietary sensor technology and premium materials from Switzerland, Apera LabSen 851-1 Glass-body pH Electrode is designed for pH measurement of viscous samples such as skincare products, cosmetics, and coatings.

Silver Ion Trap Reference System+Protelyte Electrolyte - The LabSen 851-1 pH electrode adopts a Silver Ion Trap reference system and Protelyte reference solution, minimizing junction clogs.

LabSen conical glass membrane - large surface area rendering fast response, and is 10 times stronger than traditional glass membranes, saving the electrode from accidental damage.

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera MP500) to enable ATC or manually input temperature to realize temperature compensation.

• Proprietary sensor technology and premium materials from Switzerland
• LabSen conical glass membrane ideal for viscous samples
• Silver Ion Trap Reference System + Protelyte reference solution
• The blue gel electrolyte eliminating the chance of any air bubbles inside the sensor
• Lead-free glass body

AI3155 LabSen 851-S Glass-body pH Electrode for Highly Viscous Solutions by Apera

LabSen 851-S pH electrode is designed for high-accuracy pH measurement of highly viscous samples such as coatings, syrups, resin, glue, and etc.

The pre-pressurized structure allows the electrolyte to stably flow out even in highly viscous samples so as to ensure reliable measurements.

LabSen S-type glass membrane - fast response and is 10 times stronger than traditional glass membranes, saving the electrode from accidental damage.

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera MP500) to enable ATC or manually input temperature to realize temperature compensation.

• Proprietary sensor technology and premium materials from Switzerland
• The low-impedance S membrane ensures a fast response and is yet impact resistant.
• Pre-pressurized reference system for smooth electrolyte flow
• Silver Ion Trap Reference System ensures a stable reference potential and long service life.
• Lead-free glass body

AI3167 LabSen 861 Glass-body pH Electrode for High-temp. and Caustic Solutions by Apera

LabSen 861 pH electrode is designed for high-accuracy pH measurement of corrosive and high-temp. solutions such as electroplating solutions.

The special PHY membrane is highly resistant to chemical corrosions, maximizing the reliability and service life of the electrode in complex and high-temp. solution testing.

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera MP500) to enable ATC or manually input temperature to realize temperature compensation.

• PHY glass membrane made for high-temp. and caustic solutions
• The PTFE ring junction prevents junction clogs from complex chemicals.
• Blue gel inner solution - does not flow and will not generate air bubbles.
• Suitable for high-temperature solutions (up to 130°C)
• Lead-free glass body

AI3168 LabSen 851-H Pre-Pressurized Glass-body pH Electrode for Highly Viscous Samples with Strong Alkali or High Temperature by Apera

LabSen 851-H pH electrode is designed for high-accuracy pH measurement of highly viscous samples with strong base or high temperature.

The pre-pressurized structure allows the electrolyte to stably flow out even in highly viscous samples so as to ensure reliable measurements.

HA Glass Membrane - better accuracy and repeatability in strong alkaline solutions (10 to 14 pH), minimizing alkaline errors.

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera MP500) to enable ATC or manually input temperature to realize temperature compensation.

• PHY glass membrane made for high-temp. and caustic solutions
• Proprietary sensor technology and premium materials from Switzerland
• LabSen HA-type glass membrane designed for strong alkalis (pH 10-14), minimizing alkaline errors
• Pre-pressurized reference system for smooth electrolyte flow
• Silver Ion Trap Reference System ensures a stable reference potential and long service life.
• Lead-free glass body

AI3201 LabSen 753 Stainless Steel Spear pH/Temp. Electrode for Solid Food Samples by Apera

Built with proprietary sensor technology and premium materials from Switzerland, Apera LabSen 753 Titanium-body pH/Temp. Electrode is designed for food samples such as cheese, fruits, dough, sushi rice, and meat products. LabSen S-type spear glass membrane - low resistance and high firmness, rendering fully stabilized readings in 15 to 30 seconds, and is yet 10 times stronger than traditional glass membranes, highly resistant to general impact, eliminating the chance of accidental breakage when inserting into food samples.

Open&Ceramic double-junction with Polymer electrolyte - ensures full contact with test samples while minimizing junction clogs. No need to refill electrolyte.

Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of reference electrode and extends the service life of the electrode.

Compatible with all Apera Instruments meters with BNC and RCA connectors such as PH910, PH9500, PH850, PC8500, and PH820. May NOT work with other brands' meters because the thermistor might be incompatible.

• Spear sensor designed for direct pH test of food samples such as cheese, fruits, dough, sushi rice, and meat products
• LabSen S-type glass membrane, featuring fast response and high firmness
• Open&Ceramic double-junction with Polymer electrolyte
• Long-Life Reference System - improves the stability of the reference and extends the electrode's service life
• Built-in temperature sensor for ATC

AI3202 LabSen 763 Stainless Steel Blade Spear pH/Temp. Electrode for Meat by Apera

Built with proprietary sensor technology and premium materials from Switzerland, Apera LabSen 763 Titanium-body Blade Spear pH/Temp. Electrode is designed for direct pH test of meats.

LabSen S-type spear glass membrane - low resistance and high firmness, rendering fully stabilized readings in 15 to 30 seconds, and is yet 10 times stronger than traditional glass membranes, highly resistant to general impact, eliminating the chance of accidental breakage when cutting through meat samples.

Open&Ceramic double-junction with Polymer electrolyte - ensures full contact with test samples while minimizing junction clogs. No need to refill electrolyte.

Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of reference electrode and extends the service life of the electrode.

Compatible with all Apera Instruments meters with BNC and RCA connectors such as PH910, PH9500, PH850, PC8500, and PH820. May NOT work with other brands' meters because the thermistor might be incompatible.

• Blade spear sensor designed for direct pH test of meats
• LabSen S-type glass membrane, featuring fast response and high firmness
• Open&Ceramic double-junction with Polymer electrolyte
• Long-Life Reference System - improves the stability of the reference and extends the electrode's service life
• Built-in temperature sensor for ATC

LabSen 843 Glass-body pH/Temp. Electrode for Strong Alkali and High Salinity Solutions

LabSen 833 Glass-body pH/Temp. Electrode for Strong Acid Samples and HF (Hydrofluoric) Acid

AI3165 LabSen 853-S Glass-body pH/Temp. Electrode for Highly Viscous Solutions by Apera

LabSen 853-S pH/temp. electrode is designed for high-accuracy pH measurement of highly viscous samples such as coatings, syrups, resin, glue, and etc.

The pre-pressurized structure allows the electrolyte to stably flow out even in highly viscous samples so as to ensure reliable measurements.

LabSen S-type glass membrane - fast response and is 10 times stronger than traditional glass membranes, saving the electrode from accidental damage.

Compatible with all Apera Instruments meters with BNC and RCA connectors such as PH910, PH9500, PH850, PC8500, and PH820. May NOT work with other brands' meters because the thermistor might be incompatible.

• Proprietary sensor technology and premium materials from Switzerland
• The low-impedance S membrane ensures a fast response and is yet impact resistant.
• Pre-pressurized reference system for smooth electrolyte flow
• Built-in temperature sensor for ATC
• Silver Ion Trap Reference System ensures a stable reference potential and long service life.
• Lead-free glass body

LabSen 863 Glass-body pH Electrode for High-temp. and Caustic Solutions

AI3172 LabSen 373 PVC-body Flat pH Electrode by Apera

Built with proprietary sensor technology and premium materials, Apera LabSen 371 POM-body pH Electrode is designed for flat surface pH measurement such as skin, paper, textiles, etc.

Special Flat Glass Membrane - LabSen 371 pH electrode adopts a flat glass membrane with PTFE ring junction, making reliable surface pH test easier than ever.

Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of reference system and extends the service life of the electrode.

Compatible with all Apera Instruments meters with BNC and RCA connectors such as PH910, PH9500, PH850, PC8500, and PH820. May NOT work with other brands' meters because the thermistor might be incompatible.

• Proprietary pH sensor technology and premium materials from Switzerland
• Special LabSen flat glass membrane, suitable for flat surface pH measurement such as skin, textiles, paper, and small-volume samples etc.
• Long-Life Reference System, improving the stability of reference electrode and prolonging the service life of the electrode
• Anti-clogging PTFE ring junction
• Built-in temperature sensor for automatic temperature compensation
• No more air bubbles inside the glass membrane thanks to the Swiss blue gel electrolyte.

LabSen 873 Glass-body Double-junction pH/Temp. Electrode for non-aquaous/Organic Solutions

LabSen 871 Glass-body Double-junction pH Electrode for non-aquaous/Organic Solutions by Apera

Built with proprietary sensor technology and premium materials from Switzerland, Apera LabSen 871 Glass-body pH Electrode is made for pH measurement of both water-miscible organic solvents (e.g. Methanol, Ethanol, isopropanol, DMSO, Acetonitrile) and water-immiscible organic solvents (e.g. hexane, chloroform, toluene, etc.)

• Proprietary sensor technology and premium materials from Switzerland
• Built with LabSen's most robust PHY glass membrane, effectively protecting the membrane's hydrated gel layer from damage by organic solvents and maintaining sensitivity to the hydrogen ion response
• Double liquid junction structure — the outer junction adopts a movable sleeve with 1M LiCl electrolyte for better solubility in organic solvents, resulting in more stable readings
• The specially formulated blue gel inner electrolyte eliminates the chance of any air bubbles inside the sensor. Just so you don't have to worry about jumping readings out of nowhere. extends the electrode's service life.