HK Instruments CDT-MOD-2000-1R-D 二氧化碳变送器 (CO2: 400–2000 ppm; with relay)

Measurement ranges:

CO2: 400–2000 ppm

Temperature: 0...50 °C

Communication: RS-485 Modbus (RTU)

Accuracy: 

CO2: ±40 ppm + 3 % of reading, DC model: 75 ppm or 10 % of reading (whichever is greater) 

Temperature: <0.5 °C 

Total error band includes accuracy, hysteresis and temperature effect over 5...50 °C and 10–90 % rH 

Measuring elements: Temperature sensor: Pt1000 / Integrated (models with rH-measurement), Non Dispersive Infrared (NDIR) CO2 sensor, thermoset polymer capacitive sensing element for humidity

Measuring units: ppm, °C, % rH

Calibration: Automatic self-calibration, ABC LogicTM or continuous comparison (DC)

Supply voltage: 24 VDC/VAC ±10 %

Current consumption: max 90 mA (at 24 V) + 10 mA for each voltage output or 20 mA for each current output

Output signal for selected measurement: 0/2…10 V (linear to CO2, rH or T) (2–10 VDC display models only) or 4…20 mA (linear to CO2, rH or T)

Optional relay output: Potential free SPDT 250 VAC, 6 A / 30 VDC, 6 A with adjustable switching point and hysteresis

Operating temperature: 0...50°C

Protection standard: IP20