The ASM-02 staircase automatic switch is used to control lighting in corridors or staircases. After the system is triggered, it turns on the lighting for the time set by the user, followed by automatic shutdown. The working time can be smoothly adjusted in the range from 2 s to 10 minutes by means of a potentiometer located on the front panel of the machine. The machine is equipped with an anti-blocking function. The ASM02 staircase automatic switch can also be used as a time relay with a delayed switch-off function.