Humidity transmitters

duct mounted

RHT Duct

Humidity transmitters with temperature output for duct

RHT Duct is a relative humidity transmitter with temperature output installed in air ventilation duct. In addition to these measured values, RHT Duct calculates various parameters such as dew point, mixing ratio, enthalpy and absolute humidity. Illuminated display ensures easy readability also from a distance. The RHT has a screwless lid and an easily adjustable mounting flange that make the installation of the device easy.

 

RHT Duct series devices include:

• Two selectable voltage outputs (0-10 V / 2-10 V / 0-5 V) for measured and calculated parameters (rH, T, dew point, mixing ratio, enthalpy and absolute humidity).

• Offset feature enabling field calibration for measurement parameters rH and T.

• Mounting flange

 

RHT Duct series device options offer:

• Clear backlit display

• Modbus RTU interface

• 4-20 mA proportional output

Technical details

Accuracy: Temperature: <0.5 °C
Relative humidity: ±2…3 % rH at 0…50 °C and 10…90 % rH
Total error band includes accuracy, hysteresis and temperature effect over 5...50 °C and 10–90 % rH
Measuring units: °C, % rH
Measurement elements: NTC10k temperature sensor, thermoset polymer capacitive sensing element for humidity
Supply voltage: 24 VDC/VAC ±10 %
Output signal 1: 0/2…5/10 V (relative humidity (default), temperature, dew point, mixing ratio, enthalpy, absolute humidity)
Output signal 2: 0/2…5/10 V (temperature (default), relative humidity, dew point, mixing ratio, enthalpy, absolute humidity)
Optional output signal 3: 4...20 mA (relative humidity (default), temperature, dew point, mixing ratio, enthalpy, absolute humidity) (A model)
Optional output signal 4: 4...20 mA (temperature (default), relative humidity, dew point, mixing ratio, enthalpy, absolute humidity) (A model)
Operating temperature: 0...+50 °C
Protection standard: IP54
Product datasheet Installation instructions EU Declaration of Conformity UK Declaration of Conformity

RHT Duct

Example
RHT Duct-D

Model

Product series

RHT
Relative humidity transmitter, analog outputs
RHT-MOD
Relative humidity transmitter, Modbus communication
RHT

Mounting

Duct
Duct mount
Duct

Output

Voltage output
-A
Voltage and current output

Display

-D
With display
Without display
-D

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