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Humidity transmitters
We offer a wide range of room, duct and outdoor humidity transmitters. If rooms, apartments, flats, buildings are ventilated poorly, condensate is formed. It leads to a negative impact on the well-being and health of residents. The ability to measure and control RH not only helps to maintain a comfortable environment inside the building but also helps optimize the efficiency of the HVAC system by indicating the amount of outside air. Since humidity is a basic parameter that determines the comfort and well-being of individuals, we provide various transmitters for the measurement of humidity.
Room humidity transmitter
Room humidity and temperature transmitter measure relative humidity and temperature. The measurement results are available via analogue signal 0 – 5 V or 0 – 10 V output. These humidity and temperature sensors have Modbus communication by RS485 and could be used in refrigeration, air conditioning, ventilation and clean room technology, in interior rooms such as residential rooms, offices, hotels, technical rooms, meeting rooms and convention centres. Possible to set the sensor Modbus address manually by switches or via Modbus RTU. This humidity sensor is for a 3-wire connection. The output ground (GND) is connected to the supply voltage (V-) ground in the sensor PCB. In any case, do not connect this common ground to other devices that are powered by DC voltage.
Features
- Power supply 20 – 30 VDC, 20 – 28 VAC
- Temperature and relative humidity measurement
- 0-5 V or 0-10 V analogue output (hardware selectable range) proportional to relative humidity
- 3 status LED indication
- Integrated 120Ω terminating resistor
- Protection class IP30
Duct humidity transmitter
Duct humidity and temperature transmitter measure relative humidity and temperature and it can be used to mount in ventilation ducts. The measurement results are available via analogue signal 0 – 5 V or 0 – 10 V output. The relative humidity measurement range is from 0 to 100 %. The accuracy of this sensor for humidity there is ±3 % at 20°C and temperature ±3 %. The plastic enclosure is made from polycarbonate. This humidity sensor is for a 3-wire connection. The output ground (GND) is connected to the supply voltage (V-) ground in the sensor PCB. In any case, do not connect this common ground to other devices that are powered by DC voltage.
Features
- Power supply 15 – 24 VDC, 24 VAC
- Temperature and relative humidity measurement
- Power consumption < 1W
- 0-5V or 0-10V analogue output (hardware selectable range) proportional to relative humidity
- Protection class IP54
Duct humidity transmitter with modbus
Duct humidity and temperature transmitter measure relative humidity and temperature and it could be used to mount in ventilation ducts. The measurement results are available via analogue signal 0 – 5 V or 0 – 10 V output. These humidity and temperature sensors have Modbus communication by RS485 and are possible to set the Modbus address manually by switches or via Modbus RTU. This humidity sensor is for a 3-wire connection. The output ground (GND) is connected to the supply voltage (V-) ground in the sensor PCB. In any case, do not connect this common ground to other devices that are powered by DC voltage.
Features
- Power supply 20 – 30 VDC, 20 – 28 VAC
- Temperature and relative humidity measurement
- 0-5V or 0-10V analogue output (hardware selectable range) proportional to relative humidity
- Integrated 120Ω terminating resistor
- Protection class IP54
Outdoor humidity transmitter
The outdoor humidity and temperature transmitter measures the humidity and temperature of the air. This humidity transmitter converts the measurements into standard signals of 0-10 VDC or 4-20 mA. The outdoor humidity and temperature transmitter can be ordered with or without display. DIP switch on PCB let what humidity you need to measure: relative humidity, absolute humidity or dew point measurement. While this transmitter enclosure is IP65 class it could be installed in harsh environment applications. The output ground (GND) is connected to the supply voltage (V-) ground in the sensor PCB. In any case, do not connect this common ground to other devices that are powered by DC voltage.
Features
- Power supply 24 VAC, 16 – 36 VDC
- Temperature and relative humidity measurement
- 0-10 V or 4-20 mA analogue output
- Accuracy: humidity ±2%, temperature ±0,3K
- Protection class IP65
| Type | Humidity Output | Temperature Output | LCD Display |
|---|---|---|---|
| OHT 010 010 | 0-10 VDC | 0-10 VDC | No |
| OHT 010 010 D | 0-10 VDC | 0-10 VDC | Yes |
| OHT 420 420 | 4-20 mA | 4-20 mA | No |
| OHT 420 420 D | 4-20 mA | 4-20 mA | Yes |