IN07A: Water Leak alarm test video.
Water Leak Alarm is a small electronic device that is designed to detect the presence of water and alert humans in time to allow the prevention of water damage. Its design is a small device that lays flat on the wall and relies on the electrical conductivity of water to decrease the resistance across two contacts. A 9 volt battery then sounds an audible alarm in the presence of enough water to bridge the contacts. Water Leak Alarm is useful in a normally occupied area near any appliance that has the potential to leak water, such as a washing machine, refrigerator with icemaker, dehumidifier, air conditioner, or water heater.
When you don't use the door alarm accessory, please take off the battery.