This is a device for noncontact measurement of natural gas CH4 concentration based on laser absorption spectroscopy When the instrument is working it emits a specific wavelength range the center wavelength is not the same for different gases under testof the detection laser which is diffusely reflected when it ments reflector eg the ground valves pipelines walls etc and part of the laser is returned to the detection unit of the instrument In the beam path if there is a gas leakage of the measured gas to form a gas cloud the gas cloud will be absorbed by the detection laser the amount unabsorbed light and the ratio of the amount of absorbed light and the concentration of the gas cloud into a function of proportionality through the calculation of the ratio of the inverse of the concentration of the gas cloud Features Small size light weight can be put into the pocket Multifunction expansion optional Bluetooth function Miniaturized design and highly integrated microstructure design Specification Shell material ABS Device interface USBType C Input Voltage DC 37V Detecting gases Methane CH4 Detection Principle laser absorption spectrum Detection laser power 15mW Detection of laser safety Class I laser safe for human eyes Detection distance 030 m Detection range 0 to 50000 ppmm Detection error 5 or less Level of Sensitivity 5 ppmm Response time 01s