Features： 1、The equipment is made of high?quality anti?ultraviolet materials, which can effectively block ultraviolet radiation and prevent rapid aging of the equipment. 2、High accuracy, wide range of ambient temperature, stable and reliable work. 3、High?density material shell, enclosed by a waterproof strip to protect the circuit board and has a significant moisture?proof effect. 4、RS485 signal output, standard communication protocol, stable output signal. 5、Small size, light-weight louvered box structure, standard 6-story height, can be adjusted according to user needs. 6、It is widely used in agricultural greenhouse, flower culture and other occasion requiring CO2 and temperature and humidity monitoring. Specification： Condition: 100% Brand New Item Type: CO2 Temperature Humidity Transmitter Material: ABS Color: As shown in the picture Size: Approx.138x78mm/5.4x3.1in Mounting Bracket Length: Approx.67mm/2.6in Weight: Approx.655g/23.1oz Application: Integrative temperature transmitter Temperature and Humidity Parameters: Temperature Range: -40℃-80℃ Humidity Range: 0%-100%RH Temperature Accuracy: ±0.5℃ (25℃) Humidity Accuracy: ±3%RH (5%RH-95RH, 25℃) Power Supply: DC10-30V Output Signal: RS485 (for Modbus protocol) Response Time: <15S (1m/s wind speed) Long-Term Stability Temperature: <0.1C/y, humidity: <1%RHly CO2 Parameters: Range: 0-5000ppm Accuracy: ±(40ppm+3%F?s) (25℃) Working Temperature: -20-+60℃, 0%-80RH Power Supply Mode: DC 10-30V Output Signal: RS485 (for Modbus protocol) Response Time: <10s (1m/s wind speed) Warm-up Time: 2min (available), 10min (maximum accuracy) Long-Term Stability: <30ppm/y Package List： 1 x CO2 Temperature Humidity Transmitter 1 x Bag of Screw(8pcs)