Testo 6621 HVAC Temperature & Humidity Transmitter

Item #:

XXYY-0555-6621

Brand:

Testo

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$211.00

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Description

6621 HVAC Temperature & Humidity Transmitter by Testo

A broad variety of the testo 6621 transmitter is available. Depending on the application in a room or in a duct, the corresponding designs can be selected. A display and an external probe are available as options. You can choose between the housing colours grey and white. The testo 6621 is persuasive in technical terms thanks to the patented humidity sensors that guarantee the highest accuracy. The sensors and the analog outputs can be adjusted, analyzed and parameterized via the external interface using the P2A software.

The testo 6621 is a high-performance transmitter for a low price. It meets the increasing requirements in automated building services in terms of accuracy, reliability and safety and thereby saves energy costs.

Highly accurate testo humidity sensor with long-term stability (±2.0% RH)
Optional 2-line LCD display
P2A software for parameterization, adjustment and analysis, saves time and costs in commissioning and maintenance
Optimum calibration concept thanks to adjustment of the entire signal chain (1-point, 2-point and analog adjustment)
Adjustment without dismantling the transmitter
2 analog outputs (humidity/temperature), option of 1 passive humidity and temperature analog output

Specifications

	testo 6621 – A01/A03 (wall version)	testo 6621 – A02 (duct version)
Parameters
Humidity
Meas. range	0 to 100% RH (>90% RH only briefly) (not for high humidity processes)
Accuracy	±2.0 %RH (0 to 90 %RH), ±4 %RH (90 to 100 %RH)
Temperature dependency/coefficient	Temperature coefficient: 0.05%/K (gap of 25 °C/77 °F)
Sensor	Testo humidity sensor
Replaceability of sensor	Through Testo Service	Can be done by customer (s. below, Replacement sensors), subsequent 2-point adjustment required
Temperature
Meas. range	0 to +60 °C (+32 to +140 °F)	-20 to +70 °C (-4 to +158 °F)
Accuracy	±0,5 °C / 0,9 °F
Sensor	Active signal output: NTC Passive signal output: NI1000
Inputs and outputs
Analog outputs
Number of channels	2 channels (humidity and temperature)
Output type	4 to 20 mA (2-wire) 0 to 1/5/10 V (4-wire)
Measuring rate	1/s
Accuracy of analog outputs	4 to 20 mA ±0,05 mA 0 to 1 V ±2,5 mV 0 to 5 V ±12,5 mV 0 to 10 V ±25 mV
Power
Voltage supply	20 to 30 V AC/DC
Output	Voltage supply [V]	Current consumption [mA]
2-wire current 4 to 20 mA	20 24 30	20 20 30
4-wire voltage 0 to 10V	24 30 20 24 30	7 7 20 22 28
General
Housing
Material / colour	ABS/pure white (RAL 9010) or light grey
Dimensions	81 x 81 x 26 mm	81 x 81 x 42 mm
Weight	80 g / 90 g (A03)	160 g
Display
Display	2-line LCD (optional)
Resolution	Humidity: 0.1 %RH Temperature: 0.1 °C/°F
Operation
Parameterization	P2A software
Assembly
Cable screw connection	None (cable routed through rear wall opening or break-out opening on bottom)	1 x M16 x 1,5
Other features
Protection class	IP30	IP65
EMC	According to EC directive 2004/108/EEC
Interfaces	1x mini-DIN for connecting reference measuring instrument/PC
Reaction time	t90: < 15 s at 2 m/s; When calibrating, make note of adjustment: The response time may be considerably higher in stagnant air
Scaling range	-50 to 100 °C / -58 to 212 °F, -50 to 100 %RH
Operating conditions
Electronics temperature (housing) (with/without display)	0 to +60 °C/32 to +140 °F (A01/A03), With display: 0 to +50 °C/+32 to +122 °F; -20 to +70 °C/-4 to +158 °F (A02), With display: 0 to +50 °C/+32 to +122 °F
Storage temp.	-40 to +70 °C (-40 to +176 °F)
Measuring medium	Air in air-conditioning systems or airconditioned rooms