The contact meter type SL is a portable, reliable instrument for measuring water level and total depth in boreholes, wells, reservoirs, … For the measurement the bob is lowered to the water level. When touching the level, a sensor effects the illumination of a signal lamp. On request, an additional acoustic signal will be released by a buzzer. The depth is shown on the cable in metres and centimetres. If the measurement of water level and total depth is desired, an additional ground sensor is adaptable. When the sensor is touching the bottom, the signal lamp is switched off. In case of very small diameter tubes, instruments with a probe of 10 mm Ø are available (except for ground sensor and sensor cap).
