RHT Duct

Humidity transmitters with temperature output for duct

RHT Duct is a relative humidity transmitter with temperature output installed in air ventilation duct. 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:
• Separate output for each measurement parameter (rH and T)
• Mounting flange

RHT Duct series device options offer:
• Clear backlit display
• Modbus RTU interface

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 %
Current consumption: max 90 mA (at 24 V) + 10 mA for each voltage output
Output signal 1: 0/2…5/10 V (linear to rH), L min 1 kΩ
Output signal 2: 0/2…5/10 V (linear to T), L min 1 kΩ
Operating temperature: 0...+50 °C
Protection standard: IP54

RHT Duct

RHT Duct-D


Product series

Relative humidity transmitter, analog outputs
Relative humidity transmitter, Modbus communication


Duct mount


With display
Without display

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