Feature 1The new infrared calibration technology is used to measure the CO2 concentration with high accuracy and long service life. 2Support 485 communication, standard Modbus-RTU communication protocol, communication address and baud rate can be set, the farthest communication distance is 2000 meters. 3The shell is made of high quality PVC material, which is durable, wear-resistant and corrosion-resistant. 4Wide measuring range, with temperature compensation function, little affected by temperature. 5Wall mounted installation is adopted, with simple installation method, protection grade of IP65 and high reliability. 6It is widely used in agricultural greenhouse, flower culture, mushroom planting and other occasion requiring CO2 and temperature and humidity monitoring.Condition: 100% Brand NewItem Type: CO2 TransmitterMaterial: PVCPower Supply: 10-30V DCAverage Current: <85mAMeasuring Range: 400-5000PPmCO2 Accuracy: (40ppm + 3% FS) (25 )Temperature Measurement Range: -40 -80 Temperature Accuracy: 0.5 Humidity Measurement Range: 0-100% RHHumidity Accuracy: 3% RHWorking Temperature: -40 -+ 60 Operating Humidity: 0% RH-80% RHStability: <2% FSNon-Linearity: <1% FSData Update Time: 2sWarm-Up Time: 2min (Available), 10min (Maximum Accuracy)Temperature Effect: Comes with Temperature CompensationOutput Signal: 485Protection Level: IP65Weight: Approx. 177g / 6.2ozSize: Approx. 13x11.7x4.2cm / 5.1x4.6x1.7inInterface Description:Wide voltage power input 10-30V. When connecting 485 signal line, note that A / B lines cannot be connected reversely, and the addresses of multiple devices on the bus cannot conflict. Line Color Description Power Supply Brown Power Supply (10 - 30V DC) Black Negative Power Communication Yellow 485-A Blue 485-B Basic Communication Parameters: Code 8-Bit Binary Data Bit 8-Bit Parity Bit No Stop Bit 1 Person Error Checking CRC (Redundant Cyclic Code) Baud Rate 2400bit / s, 4800bit / s, 9600 bit / s can be set, the factory default is 4800bit / s Common Problems and Solutions:Possible reasons for the toolnot being able to connect to the PLC or computer:1. The computer has multiple COM ports. The selected port is incorrect.2. The address of the toolis wrong, or there are devices with duplicate addresses (factory default is 1).3. Baud rate, verification mode, data bit, stop bit error.4. The host polling interval and waiting time are too short, which need to be set above 200ms.5.485 bus is disconnected, or a and B wires are connected reversely.6. If the number of equipment is too large or the wiring is too long, the power shall be supplied nearby, 485 intensifier shall be added, and 120 terminal resistance shall be added at the same time.7. The usb-485 drive is not installed or damaged.8. The equipment is damaged. .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x CO2 Sensor1 x Bag of Accessories (2 x Screws, 2 x Screw Cap)Note1.Please allow 0-1 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.