...Tank Talk. View the level of your water tank upto 100 metres away. The LiquiLevel ultrasonic tank sensor and transmitter is installed at the top of your water tank. The transmitter unit measures the water level and temperature using an ultrasonic sensor which is built-in to the transmitter. The Liquilevel reciever can either Hang on the wall or sit on your desk, or anywhere that's convenient for you. View room temperature, tank temperature and water level (represented by a 10 element bar graph). You can store min/max records and set alarms for specific water levels (high/low) or when empty.