Overview
The Belimo 22DTH-55M is a high-performance duct humidity and temperature sensor featuring integrated Modbus RTU communication alongside selectable 0…5 V or 0…10 V analog outputs.
Features
- Modbus RTU (RS485) communication protocol support
- Dual active analog voltage outputs (0…5 V, 0…10 V)
- Measures relative humidity, absolute humidity, enthalpy, dew point, and temperature
- NEMA 4X / IP65 rated enclosure for demanding environments
Specifications
- Communication: Modbus RTU
- Measured Values: Humidity and Temperature
- Probe Length: 5.5 inches [140 mm]
- Output Signal Active: Modbus RTU, 0…5 V, 0…10 V
- Enclosure Rating: NEMA 4X / IP65
Applications
- Networked building automation systems utilizing Modbus RS485 communication
- Commercial ductwork climate control and energy management



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