... oil fields, refineries, chemical plants), shipbuilding, automobile manufacturing, power plants, construction, machinery manufacturing and profiles, pressure vessels, boilers, storage ... ~ 9990m / s;6) Zero calibration block: 5.0mm7) Power consumption: 0.3W;8) Auto off: do nothing after boot ... , about 1 minute automatic shutdown9) Power supply: 5 V ordinary batteries or nickel cadmium battery10 ...