The Watchman Sonic Oil Tank Gauge, although suitable for most fluids, is primarily designed as a heating oil tank gauge. Consisting of a transmitter that fits to the top of the tank and electronic receiver that has a 200 metre range, the Watchman fuel tank gauge measures the fuel contents and transmits it to the receiver plugged in inside the building. This domestic oil tank level monitor also alerts the receiver when the tank level falls below 10%, giving the user notice of the need to refuel without them having to access the tank outside to check. These oil tank level indicators are suitable to be installed on both plastic and steel tanks, providing that it does not exceed  their limit of 3 metres in height

Features of the Watchman Oil Tank Level Gauge:

• Ultrasonic oil tank level gauge 

• Bar graph level display -10% per bar
• Transmission distance of 200m
• Electronic receiver must be plugged into wall socket at 150-250v
• Transmitter powered by 3v lithium cell
• Tank empty red flashing LED