LIQUA is a digital capacity and level indicator used for measuring the volume of liquids in tanks, i.e.: rainwater, septic tanks, drinking water, heating oil and other liquids. LIQUA is suitable for use in all tank shapes, i.e.: barrels, cisterns, cube, cylinder and sphere tanks. The result obtained can be read by the user on the display in litres [l.], percentages [%] and centimetres [cm]. The device is powered by a 9V battery. In the event of a low battery, the device will inform the user of the need to replace the battery with a "bat" message.