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The Belimo 22DTH-15M is a duct sensor designed for simultaneous measurement of relative humidity and temperature in air ducts. In addition to humidity, the output signal can be selected to represent absolute humidity, dew point, or enthalpy. The sensor features Modbus RTU communication and two integrated analogue outputs (0-10 V). Thanks to its robust IP65/NEMA 4X enclosure, the sensor is suitable for demanding environments. The capacitive polymer sensor element with a stainless steel wire mesh filter ensures stable and accurate measurement.
The sensor is mounted into the duct wall using the supplied mounting flange. The 140 mm probe extends sufficiently into the duct for representative measurement. Electrical connection is made via a pluggable terminal block (max. 2.5 mm²) with cable gland including strain relief. Configuration of measurement ranges and output signals is possible via Modbus or through the Belimo Duct Sensor Assistant App in combination with the optional Bluetooth dongle. This duct sensor is suitable for use in central air handling units, air ducts and climate control systems in commercial and industrial buildings where reliable humidity and temperature measurement is required.
The sensor is fitted with a 140 mm long probe with a diameter of 19.5 mm, suitable for installation in standard air ducts. The robust orange housing is made from UV-resistant polycarbonate with an NBR seal and weighs 0.26 kg. The medium temperature may reach up to 80°C and the maximum airflow is 12 m/s. The nominal supply voltage is AC/DC 24 V.
| Brand | Belimo |
| Category | Sensors and controllers |
| GTIN | 7630498117909 |
| Manufacturer's item number | 22DTH-15M |
| Article number | 23010048 |
| Category code | 101 |
| With mounting material | Yes |
| Suitable for wall mounting | No |
| Suitable for ceiling mounting | No |
| Suitable for duct mounting | Yes |
| Suitable for tube mounting | No |
| Suitable for air | Yes |
| Suitable for liquids | No |
| Suitable for gases | No |
| With housing | Yes |
| Cover attachment | Screwed |
| Sensor element inside housing | No |
| Sensor element outside housing | Yes |
| Fixed cable to sensor | No |
| Sensor length | 140 mm |
| Insert length | 140 mm |
| Diameter sensor element | 19.5 mm |
| Material element | Stainless steel |
| Technology | Capacitive polymer sensor |
| Active temperature measurement | Yes |
| Passive temperature measurement | No |
| Average temperature measuring | No |
| Number of measuring points | 1 |
| Measurement of CO2 | No |
| Measurement of VOC | No |
| Measurement of relative air humidity | Yes |
| Measurement of absolute air humidity | Yes |
| Enthalpy measurement | Yes |
| Measurement of dewpoint | Yes |
| Particulate matter measurement (PM) | No |
| Temperature measuring range (min) | -20 °C |
| Temperature measuring range (max) | 80 °C |
| Dewpoint measuring range (min) | -20 % |
| Dewpoint measuring range (max) | 80 % |
| Number of measuring ranges | 1 |
| Offset setting possible | Yes |
| Trend representation | No |
| Error registration possible | No |
| Sensor type | Other |
| Tolerance | 2 % |
| Potentiometer with adjustment knob | No |
| Supporting protocol for BACnet | No |
| Supporting protocol for Modbus | Yes |
| Supporting protocol for MP (multi point) | No |
| Supporting protocol for KNX | No |
| LoRa technology | No |
| NFC (Near Field Communication) | No |
| Bluetooth | Yes |
| Wi-Fi-compatible | No |
| Standby push button | No |
| Wireless | No |
| With display | No |
| Type of power supply | Power cord |
| Type of electric connection | Terminal board |
| Rated supply voltage AC (min) | 24 V |
| Rated supply voltage AC (max) | 24 V |
| Rated supply voltage DC (min) | 24 V |
| Rated supply voltage DC (max) | 24 V |
| Number of output signals | 2 |
| Number of output ranges 0 V ... 5 V | 2 |
| Number of output ranges 0 V ... 10 V | 2 |
| Max. ambient humidity (non-condensing) | 95 % |
| Ambient temperature (min) | -35 °C |
| Ambient temperature (max) | 50 °C |
| Explosion-proof | No |
| Degree of protection (IP) | IP65 |
| Housing height | 105.8 mm |
| Housing width | 135.2 mm |
| Housing depth | 82.7 mm |
| Housing colour | Orange |
| Compatible with Apple HomeKit | No |
| Compatible with Google Assistant | No |
| Compatible with Amazon Alexa | No |
| IFTTT support available | No |
| Scope of application | Duct |
Item number: 23010047
