Model 390

390 TDS/Salt Meter by Test Products International

Measure Total Dissolved Solids (TDS), salt and temperature for food, water quality and HVAC maintenance. Easy-to-read LCD display. Measures temperature, TDS concentration and salt levels in solutions.

The AC Volt 50 is a hand held device for determining the presence or absence of AC voltage in insulated wires, wall receptacles, fuses, junction boxes, switches, and any other voltage carrying electrical system. It is not necessary to disconnect the system in question because no contact is required for operation and current flow is not necessary to locate voltage. Simply touch the plastic tip to a connection point or move it along an insulated wire. If AC voltage is present, The AC Volt 50 will sound an audio alert and an LED light in the probe tip will glow bright red. The illumination will stop at a break in the circuit or wire, and this allows the AC sensor to be used as a troubleshooting instrument.

Applications

• Water: Test TDS levels to determine purity
• Food: Test the amount of salt in food, seafood, or processed foods
• Health: Monitor the amount of salt intake
• Water Filtration: Test for TDS to determine performance level of filtration systems
• Pools & Spas: Monitor TDS levels to prevent maintenance problems
• HVAC: Test condensate water in cooling tower and humidifier reservoir applications to prevent bacterial growth
• HVAC: Test TDS levels in make-up water to prevent scale formation, corrosion, and embrittlement
• HVAC: Reduce water and chemical consump tion in boilers and cooling towers
• HVAC: Determine when to perform blowdown and add make-up water
• HVAC: Prevent contamina tion and corrosion of control valves, heat exchangers, and steam traps
• HVAC: Verify automated TDS contollers are functioning properly
• HVAC: Prevent low quality wet steam generation in boilers due to foaming caused by high TDS levels