1、Infrared Calibration Technology: The transmitter uses a new infrared verification technology to measure the CO2 concentration. High accuracy, low drift and long life. The response is fast and sensitive, avoiding the life and long term drift of traditional electrochemical sensors. 2、485 Communication: Standard RTU communication protocol, communication address and baud rate can be set, and the maximum communication distance is 2000 meters. 3、Wide Measuring Range: 0‑5000ppm (default value) by default, with temperature compensation, less affected by temperature. 4、High Protection: The equipment has 10‑30V wide voltage power supply, and the shell has high protection, which can adapt to various harsh conditions on site. The product adopts a wall mounted waterproof shell, which is easy to install and has a high degree of protection. 5、Applications: Widely used in agricultural greenhouses, flower cultivation, edible fungi cultivation, etc. that need CO2 and temperature and humidity. Monitoring scenes. Item Type: Temperature and Humidity Transmitter Material: Plastic Gross Weight: 170g / 6.0oz Size: 8.8x7.5x4.2CM / 3.5x3.0x1.7in Power Consumption: 0.3W (24V DC) Range: 0-5000ppm (default) Stability:<5% F · S or<10% reading per year Working Environment: - 10~+50 ℃, 0-95% relative humidity (non condensing) Preheating Time: 2min (available), 10min (maximum accuracy) Technical Support: 10-30V DC Accuracy: ± (50ppm+3% F·S) (25 ℃) Response Time:<30 seconds (diffusion) Expression: 485 Maximum Communication Distance: 2000m Interface Description: 2. When connecting 485 signal lines, note that the two lines A B cannot be reversed, and the addresses of multiple devices on the bus cannot conflict. Wiring Instructions:TypeThread ColorInstruction Power Supply BrownV+(10-30V DC)BlackV-CommunicationGreen485ABlue485B Communication Parameters: Coding:8 bit binary Data Bits: 8 bits Parity Bit: None Stop Bit: 1 Error Checking:CRC (Redundant Cyclic Code) Baud Rate: 2400bit/s, 4800bit/s, 9600 bit/s can be set, the factory default is 4800bit/s Application: Widely used in agricultural greenhouses, flower cultivation, edible fungi cultivation, etc. that need CO2 and temperature and humidity. Monitoring scenes. 5 x Expansion Plugs 5 x Tapping Screws 1 x Sensor 1 x Manual