W7 : Water Level Meters

Water Level Meters are used to measure the depth of water in standpipes, wells and boreholes. 

The Water Level Meter or Dipmeter comprises a Stainless Steel sensor probe fitted to a flexible graduated cable, wound on a hand reel containing a transistorised switched circuit, audio indicator and battery.

The sensor probe incorporates an insulating gap which acts as a switch, the circuit being completed when contact is made with the water.

The probe is lowered down a borehole on the end of the tape. When it makes contact with water a buzzer sounds and an LED light comes on, both located on the reel. A reading can then be taken from the tape at the top of the borehole to indicate the water depth.