LY-748 quartz electronic full sealed timer has the advantages of novel structure, high precision, stable and reliable performance, long service life, wide adaptability, low price and convenient use. It is most suitable for the industrial standard time, widely used in engineering machinery, engineering vehicles, agricultural machinery, generator, air compressor, water pump, crane, crane, various types of automobile cumulative actual work time charging and tracking and monitoring equipment to provide the scientific basis for the assessment of maintenance cycle.