Overview
The Belimo 22DCK-11 is an active duct sensor designed to measure CO₂, VOCs, CO₂+VOC mixture, and temperature in air duct systems. It provides flexible voltage output signals for comprehensive indoor air quality monitoring and demand-controlled ventilation.
Features
- Measures CO₂, VOC, CO₂+VOC mix, and temperature in a single unit
- Dual-channel NDIR technology for precise carbon dioxide measurement
- Metal Oxide Semiconductor (MOS) gas sensor for VOC detection
- Field-selectable analog voltage output (0…5 V or 0…10 V)
- NEMA 4X / IP65 rated enclosure for reliable protection
Specifications
- Measured Values: CO₂, VOC, CO₂+VOC mix, Temperature
- Output Signal: 0…5 V, 0…10 V
- Probe Length: 7 inches [180 mm]
- Probe Diameter: 0.77 inches [19.5 mm]
- Supply Voltage: 24 V AC/DC
- Enclosure Rating: NEMA 4X / IP65
Applications
- Demand-controlled ventilation (DCV) in commercial HVAC systems
- Indoor air quality (IAQ) monitoring in air handling ducts
- Integrated VOC and CO₂ tracking in building management systems


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