22DCK-51 Belimo Sensor

Overview

The Belimo 22DCK-51 is an active air quality duct sensor that measures CO₂, VOCs, CO₂+VOC combination, and temperature. Designed for commercial ventilation control, it offers selectable analog voltage outputs and dual-channel calibration for precise indoor air monitoring.

Features

• Integrated sensing for CO₂, VOC, combined CO₂+VOC mix, and temperature
• NDIR CO₂ sensing with self-calibrating dual-channel accuracy
• Selectable 0…5 V or 0…10 V output signals
• Weather-resistant IP65 / NEMA 4X rated enclosure
• Includes mounting flange and 1/2″ NPT conduit adapter

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

• Air quality monitoring in commercial supply and return ducts
• Demand-controlled ventilation in office buildings and schools
• Real-time VOC and CO₂ concentration tracking in HVAC networks