1Equipped with external hardbound probe, it has high sensitivity, accurate measurement, high humidity resistance and can be used for a long time. 2With waterproof shielded cable, waterproof, oilproof, antiinterference ability, signal transmission stability. 3There are waterproof strips at the joint of the shell, which can effectively isolate the internal and external environment, and have remarkable moistureproof effect. 4Wall hanging exquisite appearance design, installation of screw on both sides, simple installation, saving space. 5The input power supply, induction probe and signal output of the sensor are completely isolated, which is safe and reliable. 6It has the characteristics of wide measuring range, convenient use, easy installation and long transmission distance. 7This 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. Condition: 100% Brand New Item Type: CO2 Sensor Material: ABS Power Supply: DC 12-24VCO2 Measurement Range: 5000ppm/1%/3%/65%/100% Optional Average Current: v:* {behavior:url( default VML);}o:* {behavior:url( default VML);}x:* {behavior:url( default VML);}.shape {behavior:url( default VML);} 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-BInstallation 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. border: 1px solid000important;}1 x CO2 Sensor1.Please allow 01 inch error due to manual measurement. Thanks for your understanding.2.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering