The 101 Water Level Meter consists of a choice of a P2 or P6 probe design attached to a polyethylene tape at one end, and at the other end a reel containing the electronic components of the instrument. Two stainless steel conducting cables run down the length of the tape from the reel to the probe. When the probe comes in contact with water, the circuit is completed which in turn activates a buzzer and light on the reel. The tape has clear markings every millimetre and is labeled every centimetre and metre. A controller on the reel allows for a change of sensitivity to ensure a clear signal in high and low conductivity conditions.