Small, mobile hand-held device for water level measurement in groundwater.The KLL-Mini is specifically designed for shallow groundwater monitoring wells with a 10 m or 15m measurement range. It is by no means inferior to its big brothers, neither qualitatively or functionally (KLL, electric water level gauge, KLL-Light), but owing to the compact design, it is much lighter and easier to handle. The KLL-Mini comes standard with visual and audible signal. The two 1.5V batteries power the handset for approximately 250 measurements.