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Ground
Water Instruments
Testwell Water Level
Meters
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. The meter uses
a choice of probe designs, attached to a permanently marked polyethylene
tape, fitted on a well-balanced reel. It is powered by a standard 9
volt battery housed in an easy-access battery drawer. The probe incorporates
an insulating gap between electrodes. When contact is made with water,
the circuit is completed, activating a loud buzzer and a light. The
water level is then 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.
The shroud can be removed for easy cleaning, and an optional weighted
tip can be substituted for small diameter holes. The high quality polyethylene
tape reels smoothly, remains flexible and hangs straight in the well,
irrespective of temperature. Permanent markings each millimeter or 1/100
ft. allow accurate readings, traceable to NBS standards. The tapes'
stranded stainless steel conductors resist corrosion, provide strength
and are non-stretch. They make the tape very easy to repair and splice.
The reels are equipped with easywind ball bearings, on/off sensitivity
switch, light, buzzer, and battery test button. Available with tape
lengths from 30 to 300 meters and with rugged steel, aluminum or plastic
faceplates.
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