This reliable high quality ultrasonic measuring system uses FM, (this is less prone to interference), to read the oil level in your oil tank and transmits to an internal receiver with a 10 bar LCD display.
The electronic contents gauge allows the level of the fuel in the tank to be read indoors. A tank mounted transmitter determines the level of fuel remaining inside the tank and relays this information to the receiver unit. The receiver unit plugs into any standard domestic socket and displays the level of fuel remaning on the LCD display.