Although Flood sensors come in all varieties, but they pretty much all work using the same mechanism. When water touches two exposed metal probes, the device senses increased conductivity between those probes and sets off an alarm.

Water damage is one of the most frequent and expensive insurance claims. The Water Leak Detector provides with an early warning, in order to prevent or reduce potential damage from leaking roofs, pipes, or appliances, heavy rainfall, overland flooding, or rapidly melting snow or ice.

There are two common types of heat detectors: fixed temperature and rate of rise. Both rely on the heat of a fire incident to activate the signal device. Fixed-temperature detectors signal when the detection element is heated to a predetermined temperature point.