SALDO4D: Habitat Hunian Kegemarannya adalah Batu Berair

SALDO4D If you wish, you can include fire sensor switches in the loop of entry-detection switches. Alternately, battery-operated remote wireless sensors and controls can be installed. Mount the box in the desired location. Thus, opening a door or window separates magnet from switch, causing the switch to open and trigger the alarm. You will see a pattern of holes in the backplate. Once you get the system into operation, set it off deliberately about once a week just to make certain that the circuit is still in working condition and that the batteries still contain enough power to operate the system properly.|Netherlands Agency for Aerospace Programmes