For measuring the depth of water in wells, boreholes, and standpipes, the Testwell Water Level Meter is accurate to 1/100 ft or one millimeter. With several thousand units sold worldwide, Testwell Instruments have a highly respected proven track record.

The meter uses a choice of probe designs, attached to a permanently marked high quality flexible polyethylene tape, fitted on a well-balanced reel. It is powered by a standard 9 volt battery housed in an easy-access battery drawer. Testwell probes come in 5/8 (16mm), 7/16 (11mm), 3/8 (9.5mm) and ¼ (6.4mm) diameters.

The triple sealed probes do not need to be accessed by the user. Using ‘smart electronics’ the probes will ignore any damage to the optical lens and continue to perform. Water level is determined by taking a reading directly from the tape at the top of the well casing or borehole. The 0.7" diameter probe is constructed of stainless (316) steel with a Teflon shroud.