clock Timer switch widely used in control electric board. SUL181h Mechanical Timer is suit for water heater, Water dispensers, ... lamp boxes, Breed aquatics, Irrigate, Office power auto control, in anywhere need time control in civilian, home or industrial, etc. It ... stabilization. DIN Guide Rail Programmable Mechanical Timer Type: SUL181h Main functions:1) Presetting Circle time with 24 hours. 2) Up ...