Order CDTR-2W4B4-LCD by Dwyer CDTR Carbon Dioxide Transmitter - US Mega Store

The SERIES CDTR Carbon Dioxide, Relative Humidity and Temperature Transmitters reduce the number of sensors mounted on a wall or in a duct. By combining CO2, RH, and temperature in one device, system integrators reduce installation time while lowering material cost. A single beam dual wavelength non-dispersive infrared (NDIR) sensor is used to automatically correct the measurement in both occupied* and unoccupied buildings against light-source aging effects. Digital barometric pressure adjustment and field-calibratable sensor. Universal outputs for CO2 and RH enable users to select the transmitter output: 4 to 20 mA; 0 to 5 VDC or 0 to 10 VDC to work with virtually any building management controller. Display can be configured to report temp only, RH only, CO2 only, CO2 and RH, or CO2 and temp. Push buttons for access to the menu structure are standard. To prevent tampering, the action of the buttons can be locked out using an internal jumper selection. APPLICATIONS: Demand control ventilation in schools, office buildings, hospitals, and other indoor environments; LEED certification. SPECIFICATIONS: Range: CO2: 0 to 2000 or 0 to 5000 ppm (depending on model); Relative humidity: 0 to 100% ; 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 rdg per mm of Hg. Response Time: 2 minutes for 99% step change. Temp Limits: 32 to 122°F (0 to 50°C). Humidity Limits: 10 to 95% RH (non-condensing). Power Rqts: 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 Ω); Voltage: 0 to 5 VDC or 0 to 10 VDC (min 500 Ω); Relay: SPST NO 2A @ 30 VDC; RTD or thermistor per r-t curves (depending on model). Weight: 5.6 oz (158.8 g). Enclosure Rating: IP20. Agency Approvals: CE.