GJX-2-type optical interferometer calibration instrument Methane Detector Integrated Product Name: light watt Calibrator Calibrator Model: GJX-2 products manufacturers: Shandong Coal Price: Negotiable Keywords: light watt test instrument calibration, optical interference Methane Detector instrument calibration, Gas Tester Calibrator, GJX-2 Product Description: GJX-2-type optical interference Methane Detector integrated pressure calibrator is the use of the principle of communicating vessels developed. Mainly used to check the optical interference methane measuring accuracy and tightness. Technical indicators 1) Measuring range: (0 ~ 100)% CH4 2) basic error: to be the basic error correction instrument half 3) tightness: Under 700mmH2O (7000Pa) pressure continues 5min, pressure drop ≤10Pa 4 ) Power supply voltage: AC220V / 50Hz 5) Output voltage: 1.5V / 3V 6) water column height scale: 750mm 7) Dimensions: 1335 × 260 × 180 mm 8) Weight: 8kg coal mine gas refers to a coal plant in the process large amounts of gas produced, also known as CBM. In the long geological ages, since the role of coal is subjected to high temperature, high pressure, into the metamorphic stages of carbonization of coal, coal volatile reduction, fixed carbon increases, but also generate a lot of gas, stored in coal or rock pores and cracks. Gas in the mine is very dangerous and must always detect the concentration of gas in order to take preventive measures.