Overview
The Belimo 22DTM-11 is a comprehensive active duct sensor designed to measure CO₂ concentration, relative humidity, and temperature simultaneously using dual-channel NDIR technology and voltage outputs.
Features
- 3-in-1 active sensing: CO₂, humidity, and temperature
- Dual-channel NDIR technology for long-term stability without manual recalibration
- Field-selectable 0…5 V or 0…10 V active outputs for each parameter
- Weatherproof NEMA 4X / IP65 rated enclosure
Specifications
- Measured Values: CO₂, Humidity, Temperature
- Probe Length: 7 inches [180 mm]
- Probe Diameter: 0.77 inches [19.5 mm]
- Output Signal Active: 0…5 V, 0…10 V
- Enclosure Rating: NEMA 4X / IP65
Applications
- Complete indoor air quality monitoring in commercial air handling systems
- Demand-controlled ventilation and climate management



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