Temperature/Relative Humidity Transmitter Model No :- CDT-2D40-RLY Temperature : 32 to 122°F (0 to 50°C). Accuracy : ±40 ppm + 3% of reading (CO2); ±2% (RH) 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 minutes for 99% step change. Temperature Limits : 32 to 122°F (0 to 50°C). Humidity Limits : 10 to 95% RH (non-condensing). Power Requirements : 16 to 35 VDC / 19 to 28 VAC. Power Consumption : Average: 2 watts; Peak: 3.75 watts. Sensor : Single-beam, dual-wavelength NDIR. Output: Current: 4 to 20 mA (max 500 O); Voltage: 0 to 5 VDC or 0 to 10 VDC (min 500 O); Relay: SPST NO 2A @ 30 VDC Agency Approvals : CE.