The oil tank monitoring system with sensor measures

 The oil tank monitoring system tag is inserted into the underground chamber in which the tank is located, at the manhole opening. The tag's sensor measures the pressure between the tank's two walls. If the pressure changes (reaching approximately 300 millibars), the device determines that a leak may have occurred inside the inner storage wall. The tag then transmits an alert to the reader installed at the surface above the tank, with the device forwarding that alert to the gas station's control center, usually located near or in the station office or dedicated kiosk.
The automatic tank gauge systems tag typical read range through the ground is 10 meters to 15 meters (33 feet to 49 feet), depending on conditions—some types of soil can be more difficult to transmit through than others.