CO2 Sensor Module Carbon Dioxide Detector Temperature Humidity Transmitter 3-in-1 485.

1. New infrared calibration technology is used to measure CO2 concentration with high accuracy and a long lifespan. 2. Supports 485 communication, the standard Modbus-RTU communication protocol; the communication address and baud rate can be set; the maximum communication distance is 2000 meters. 3. The casing is made of high-quality PVC, durable, wear-resistant, and corrosion-resistant. 4. Wide measuring range with temperature compensation function; minimally affected by temperature. 5. Wall mounting is adopted, with a simple installation method, IP65 protection rating, and high reliability. 6. It is widely used in agricultural greenhouses, flower cultivation, mushroom cultivation, and other applications requiring monitoring of CO2, temperature, and humidity. Specification: Condition: 100% Brand New Item Type: CO2 Transmitter Material: PVC Power Supply: 10-30VDC Average Current: Measurement Range: 400-5000PPm CO2 Accuracy: ± (40ppm + 3% F·S) (25℃) Temperature Measurement Range: -40℃ -80℃ Temperature Accuracy: ± 0.5℃ Humidity Measurement Range: 0-100% RH Humidity Accuracy: ± 3% RH Operating Temperature: -40℃-+60℃ Operating Humidity: 0% RH-80% RH Stability: Non-linearity: Data Update Time: 2s Warm-up Time: 2min (available), 10min (maximum accuracy) Temperature Effect: Comes with temperature compensation Output Signal: 485 Level of Protection: IP65 Weight: approx. 177g / 6.2oz Size: approx. 13x11.7x4.2cm / 5.1x4.6x1.7in Interface Description: Wide voltage input 10-30V. When connecting a 485 signal line, note that lines A/B cannot be connected in reverse and that the addresses of multiple devices on the bus cannot conflict. Line Color Description: Power Supply: Brown (10-30V DC) Negative Power: Black Yellow Communication: 485-A Basic Communication Parameters of the Blue 485-B: Binary Code: 8 bits Data Bit: 8 bits Parity Bit: None Stop Bit: 1 person Error during CRC (Cyclic Redundant Code) check: The baud rate of 2400 bps, 4800 bps, and 9600 bps can be set; the default is 4800 bps. Common Problems and Solutions: Possible reasons why the tool cannot connect to the PLC or computer: 1. The computer has multiple COM ports. The selected port is incorrect. 2. The tool's address is incorrect, or some devices have duplicate addresses (the default is 1). 3. Baud rate, check mode, data bit, or stop bit error. 4. The high-level polling interval and wait time are too short and should be set above 200 ms. 5. The 485 bus is disconnected, or wires A and B are connected in reverse. 6. If the number of devices is too large or the cabling is too long, the power supply must be located nearby, a 485 step-up amplifier must be added, and a 120 Ω terminal resistor must be added simultaneously. 7. The USB-485 reader is not installed or is damaged. 8. The device is damaged. Package List: 1 x CO2 sensor, 1 x accessory bag (2 x screws, 2 x screw caps) Note: 1. Please allow a 0-1 inch error due to manual measurement. Thank you for your understanding. 2. Monitors are not calibrated the same way, so the color of the item shown in the photos may be slightly different from the actual object. Please consider the actual item as the standard.