Overview
The Belimo 22DTH-51MB is a combination duct sensor featuring active voltage output for relative humidity and a passive Pt1000 temperature sensor. It allows seamless integration with controllers requiring passive RTD temperature inputs.
Features
- Active humidity sensing with selectable 0…5 V / 0…10 V outputs
- Passive Pt1000 temperature element for direct RTD compatibility
- Field-selectable options for enthalpy, absolute humidity, and dew point
- Rugged IP65 / NEMA 4X protective enclosure
Specifications
- Measured Values: Humidity (active) and Temperature (passive)
- Passive Element: Pt1000
- Probe Length: 5.5 inches [140 mm]
- Output Signal Active: 0…5 V, 0…10 V
- Enclosure Rating: NEMA 4X / IP65
Applications
- Combined duct relative humidity and RTD temperature monitoring
- Commercial HVAC air handling unit control integration


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