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Range: 0 to 2000 PPM.
Accuracy: ±40 PPM + 3% of reading @ 22°C.
Temperature Dependence: 0.2% FS per °C.
Stability: < 2% of FS over life of sensor.
Non-Linearity: < 1% of FS.
Pressure Dependence: 0.13% of reading per mm of Hg.
Response Time: 3 minutes typical for 90% step change.
Duct Air Velocity Range: 0 to 1500 FPM (7.63 m/s).
Ambient Operating Temperature: 32 to 122°F (0 to 50°C).
Storage Temperature: -4 to 158°F (-20 to 70°C).
Power Requirements: 18 to 30 VAC RMS 50/60 Hz or 18 to 42 VDC.
Outputs: 0 to 10 VDC.
Housing: Flammability Classification UL rated 94V-5.
Weight: 8 oz (230 g).
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The Model CDD Duct Mount Carbon Dioxide Transmitter monitors the occupancy in a room by detecting the concentration of carbon dioxide in the return air duct. The non-dispersive infrared sensing technology automatically updates the calibration of the transmitter using a proprietary logic feature which limits the amount of error due to drift. The Model CDD can measure up to 2000 PPM in duct air flows less than 1500 FPM.