Features: HM-1 series quartz electronic hermetic timer has novel structure, dexterity, high , stable and reliable performance, long service life, wide adaptability to environment, low price and convenient use. It is most suitable for standard industrial timing, widely used in engineering machinery, engineering vehicles, agricultural machinery, generators, air compressors, pumps, driving, types of vehicles, etc. Accumulated actual working time charging and tracking monitoring equipment The assessment and maintenance cycle provides a scientific basis.