RileyFine RQ-HM008A is a device that measures the working time of a gas engine, it detects the signal through the spark plug, and various parameters can be freely programmed by the programmer. Large LCD display, clear reading, DC 5-60V and AC 86-230V two types to choose from to suit different use requirements, as well as good sealant waterproof. It is widely used in motor, wheel, metal or wood cutting work lathe, electric fan, papermaking, chemical fiber, washing machine, plastic industry, automobile manufacturing and other fields of sealant waterproofing.