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EE21

High-Precision Humidity / TemperatureTransmitter for HVAC Applications

Transmitters of the EE21 series have been developed for high-precision measurement of relative humidity and temperature. EE21 transmitters are available for wall and duct mounting with or without the very useful snap in- mounting kit, which allows a quick and easy exchange of the transmitter. Outputs can be selected between voltage and current. An optional radiation shield providing a forced ventilation is recommended for use in outdoor applications. Special protection coating for the sensing element (code - HC) permits the permanent use in very polluted environments. High humidity calibration is recommended for applications in high lasting humidities > 90% RH (Code - CA01).

EE21 H T A

With an easy routine via the push-buttons “UP” and “DOWN” on the circuit board the user can perform a fast and accurate two-point adjustment of relative humidity.

T AT D

green housesstorage rooms swimming halls meteorology measuring range 0...100% RHaccuracy ±2% RHtraceable calibrationworking range -40...60°C

(-40...140°F)

wettableexcellent long term stability Measuring values

Relative Humidity

Sensor HC1000 or HC1000C (with coating) Analogue output appropriate 0...100% RH 0-1V -0.5mA
L
1) 0...100% RH Accuracy at 20°C
L
L (68°F) ± 2% RH (0...90%) ± 3% RH (90...100%) Traceable to international standards, administrated by NIST, PTB, BEV... Hysteresis 10% - 80% - 10%

Temperature

Sensor Pt1000 (tolerance class A, DIN EN 60751) Analogue output -40...60°C
(-40...140°F) 0-1V -0.5mA
L
L
L C type A + type Mtype B + type N
C °C °C v1.4

EE21

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