1、Equipped with external hardbound probe, it has high sensitivity, accurate measurement, high humidity resistance and can be used for a long time. 2、With waterproof shielded cable, waterproof, oil‑proof, anti‑interference ability, signal transmission stability. 3、There are waterproof strips at the joint of the shell, which can effectively isolate the internal and external environment, and have remarkable moisture‑proof effect. 4、Wall hanging exquisite appearance design, installation of screw on both sides, simple installation, saving space. 5、The input power supply, induction probe and signal output of the sensor are completely isolated, which is safe and reliable. 6、It has the characteristics of wide measuring range, convenient use, easy installation and long transmission distance. 7、This carbon dioxide sensor can be widely used in agricultural greenhouses, flower cultivation and other occasions. It is a good helper for environmental monitoring such as agricultural planting, pasture and grassland. 1 x CO2 Sensor 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%F·SPreheating 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℃-80℃Long-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. 11x 8.5x4cm / 4.3x 3.3x 1.6inInterface 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.