Composition: host, charging base composed of main size and weight: L216 * W50 * H79 mm, about 200 grams (including battery) startup time: 1 second analysis test time: about 1 second can detect container size: not less than 5.5cm*1.5cm, the minimum capacity of 50ml alarm way: sound alarm, and LCD alarm man-machine interface: provide all Chinese interface, self-emitting OLED screen display data storage: provide liquid detection results storage and retrieval function, storage is not less than 10000 times, and can export the data through the USB interface. Range of operating temperature: - -10℃ - - + 55℃. More than forty flammable and explosive dangerous liquids are gasoline, kerosene, diesel oil, ethyl ether, isopropyl ether, petroleum ether, acetonitrile, ethylene glycol, nitrobenzene, benzene, epoxy, n-hepentine, acetone, benzene, methylene, xylene, dichloroethane, ethanol, n-octane, carbon disulfide, methanol, nitromethane, n-hexane, trichomethane, paint (dilute solvent), paint, methyl ethylethane, methyl tert-butyl ether, 1-4-hexacane, direnyl, acetaldehyde, and pyrroliane.