Overview
The Belimo 22DTH-51M is an active duct humidity and temperature sensor engineered for accurate climate monitoring in HVAC systems. It provides selectable 0-5 V or 0-10 V outputs for relative humidity, temperature, enthalpy, or dew point.
Features
- Simultaneous active monitoring of humidity and temperature
- Field-selectable output for relative humidity, absolute humidity, enthalpy, or dew point
- High-precision capacitive humidity sensing element
- Weatherproof NEMA 4X / IP65 enclosure
Specifications
- Measured Values: Humidity and Temperature
- Probe Length: 5.5 inches [140 mm]
- Probe Diameter: 0.77 inches [19.5 mm]
- Output Signal Active: 0…5 V, 0…10 V
- Supply Voltage: 24 V AC/DC
- Enclosure Rating: NEMA 4X / IP65
Applications
- Supply, return, and discharge air duct monitoring in commercial HVAC
- Climate control and humidity management in building automation systems



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