This water level meter is a free type and is used to judge ground subsidence and safety according to level change of underground water. WL Feature - ...Buykotra
Water levels in shockproof material with millimetre graduations. D.10 mm. fi ttings in perfect seal Abs.Level Instruments
Description: The Solinst Mini 101 Water Level Meter is ideal for use in narrow diameter applications as small as 3/8 (10 mm). The narrow 1/4 (6 mm) ...Advance Scientific Instruments
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