Condition: 100% Brand NewItem Type: CO2 SensorMaterial: ABSPower Supply: DC 12-24V CO2 Measurement Range: 5000ppm/1%/3%/65%/100% OptionalAverage Current: <85mACarbon Dioxide Accuracy: (50ppm+3% Reading) (25)Non-Linear: <1%FSPreheating Time: 2min(Available), 10min(Maximum Accuracy)Output Signal: RS485 Standard ModbusHumidity Accuracy: 3%RH(0% 6rh-100% RH,25)Temperature Accuracy: 0.5(25)Humidity Range: 0%RH-100% RHTemperature Range: -40-80Long-Term Stability of Temperature: 0.1/YLong-Term Stability of Humidity: 1%/YApplication:The transmitter is widely used in agricultural greenhouses, flower cultivation and other occasions requiring monitoring of CO2 and temperature and humidity.Weight: Approx. 227g / 8ozSize: Approx. 11x8.5x4cm / 4.3x3.3x1.6inInterface Description:Wide-voltage power supply input 12-24V can be. When connecting 485 signal lines, it should be noted that the two A/B lines can not be connected in reverse, and the addresses of multiple devices on the bus can not conflict. Line Color Explanation Power Supply Brown Power Supply Positive (12-24V DC) Power Supply Black Power Supply Negative Signal Communication Yellow (Gray) 485-A Signal Communication Blue 485-B Installation Instructions:It is necessary to place the sensor in the environment of shelter from wind and rain, 90 degrees perpendicular to the ground wall hanging, keep the sensor air vent in front, prevent water inflow. At the same time, in order to ensure the accuracy of measurement, please install the carbon dioxide transmitter in a better ventilated position.