Feature: 1. [Efficient Computing Power] Using new semiconductor nanotechnology, with efficient computing capabilities. 2. [Standard Modbus Protocol] The output signal is 485 output, in line with the standard Modbus protocol, the address and baud rate can be set, and the communication distance can be up to 2000 meters. 3. [Function] Has the functions of overvoltage protection, short circuit protection, and reverse connection protection. 4. [Excellent Performance] The gas transmitter has excellent performance such as antistatic interference, antimagnetic field interference, and automatic recovery. 5. [Target Point Calibration] Full software calibration, equipped with target point calibration, can ensure the accuracy and linearity of the measurement. Specification: Item Type: Gas Transmitter Weight: Approx. 1584g / 55.9oz Transmitter Product Size: Approx. 19.5 x 15 x 9.3cm / 7.7 x 6.0 x 3.7in Transmitter Cable Length: Approx. 50cm / 19.7in Remote Control Size: Approx. 9 x 4 x 0.5cm / 3.5 x 1.6 x 0.2in (1 x 3V CR2025 Button Battery, Battery Not Included) Power Supply: DC 10V to 30V Average Power Consumption: 0.35W Output Signal: 485 Output (Standard Modbus Protocol) Repeatability: NH3 / H2 / CO(1000ppm) / H2S / CH4 / NO2 / SO2 / CH2O / O3: ≤2% CO(2000ppm): ≤3% O2: ≤1% Stability: CO(1000ppm) / H2S / H2 / NO2 / SO2 / NH3 ≤2% Signal Value / Month CH4 / CH2O / O3 ≤7% Signal Value / Year CO(2000ppm) / O2 ≤5% Signal Value / Year Working Temperature: H2 / CO / H2S / CH4 / NO2 / SO2 / CH2O / O2 / NH3: -20℃ to 50℃ O3: -10℃ to 55℃ Working Humidity: NH3 / H2 / CO / H2S / NO2 / SO2 / CH2O / O3: 15 to 90%RH Noncondensing O2: 5 to 95%RH Noncondensing CH4: 0 to 95%RH Noncondensing Work Pressure: NH3 / H2 / CO(1000ppm) / H2S / SO2 / O2 90 to 110Kpa NO2 / CH2O / O3 91 to 111Kpa CH4 80 to 116Kpa CO (2000ppm) 80 to 120Kpa Warm Up Time: NH3 / H2 / CO / H2S / CH4 / NO2 / SO2 / CH2O / O3 / O2: ≥5 Minutes. Package List: 1 x Gas Transmitter (Battery Not Included)1 x Remote Control3 x Accessories1 x User Manual Note: Wide voltage power input is 10V to 30V. When wiring, please pay attention to the two wires A and B not to be reversed, and the addresses of multiple devices on the bus cannot be conflicted