Sensor:Single beam, dual-wavelength NDIR.Range:CO2: 0 to 2000 or 0 to 5000 ppm (depending on model); Temperature: 32 to 122°F (0 to 50°C).Accuracy:CO2: ±40 ppm ±3% of reading; Temperature: ± 1° C @ 25°.Temperature:±1°C @ 25°C.Temperature Dependence:±8 ppm/°C at 1100 ppm.Non-Linearity:16 ppm.Pressure Dependence:0.13% of reading per mm of Hg.Response Time:2 min for 99% step change.Duct Air Velocity Range:0-4000 FPM (20.32 m/s).Temperature Limits:32 to 122°F (0 to 50°C).Humidity Limits:10 to 95% RH (non-condensing).Power Requirements:16 to 35 VDC or 19 to 28 VAC.Power Consumption:Average: 2 w; Peak: 3.75 w.Output:Current: 4 to 20 mA (max 500 Ω); Voltage: 0 to 5 VDC or 0 to 10 VDC (min 500 Ω);
Relay: SPST NO 2 A @ 30 VDC;Weight:4.4 oz (125 g).Enclosure Rating:Duct mount: NEMA 4X (IP66) for housing only; Wall mount: IP20.Agency Approvals:CE.