Feature: 1. IP65 High Protection: The gas detector has an industrial wall mounted high protection housing, with a protection level of IP65, rain and snow proof, and good breathability. 2. Excellent Performance: The circuit uses imported industrial grade microprocessor chips and imported high accuracy temperature and humidity sensors to ensure excellent product reliability, high accuracy and interchangeability. 3. Output Signal: The output signal type of the gas detector is RS485, which can communicate at a distance of up to 2000 meters and has a long service life. 4. Infrared Remote Control Technology: The remote infrared remote control technology can be set without disassembly. The address, password, upper limit of gas, lower limit of gas, and alarm interval can be modified through the gas remote control. 5. Applicable Scene: The appearance is small, exquisite and beautiful, suitable for various scenes such as home, office, factory, etc. Specification: Item Type: Gas Detector Material: ABS Detector Size: Approx. 11 x 11 x 4.5cm / 4.3 x 4.3 x 1.8in Remote Control Size: Approx. 8.5 x 4 x 0.5cm / 3.3 x 1.6 x 0.2in 1xCR2025 Button Battery (Battery Not Included) Power Supply: DC 10-30v Average Power Consumption: 0.6w (DC 24v) Output Signal: 485 Output (Standard for Modbus Protocol) Repeatability: NH3/H2/CO(1000ppm)/H2S/CH4/NO2/S02/03/PH3: ≤2% CO (2000ppm): ≤3% O2: ≤1% Working Temperature: -10 to 50℃ Work Pressure: NH3/H2/CO(1000ppm)/H2S/S02/02/03/PH3: 90-110kpa NO2: 91-111kpa CH4: 80-116kpa CO (2000ppm): 80-120kpa Warm Up Time: NH3/H2/CO/H2S/CH4/NO2/S02/03/02/PH3: ≥5 Minutes ​​Weight: Approx. 250g / 8.8oz. Package List: 1 x Gas Detector4 x Screw4 x Expansion Rubber Stopper1 x Remote Control(Battery Not Included)1 x User Manual Note: Wide voltage power input is 10‑30V. When wiring the 485 signal wire, pay attention to the two wires A and B not reversed, and the addresses of multiple devices on the bus cannot be conflicted.