Oil Watchman Alarm

Oil Watchman Alarm The Oil Watchman Alarm is easy to install and works by placing a transmitter on top of the tank which continually measures the level of oil in a tank. In the event of the oil level in the tank dropping at a rate that is not common for a domestic oil tank, the receiver will emit a siren type sound that indicates a theft / leak is occurring. A watchman alarm also transmits the approximate tank level to a receiver located in the home.