Solinst
Model 102
Coaxial Cable
Water Level Meter
The Model 102 Water Level Meter has been
designed for measuring groundwater levels, especially in small diameter
tubes and piezometers. The cable has a heavy duty jacket and stainless
steel inner conductor for strength. For situations where highly accurate
measurements or speed of reading is more important the Model
101 Flat Tape Water Level Meter is also available.
Model
102 Operating Principles
The Model 102 Water Level Meter uses a 9V
battery and a small diameter probe on narrow coaxial cable. When the probe
enters water the electrical circuit is completed, sending a signal back to
the reel where a light and clearly audible buzzer are activated. The water
level is then determined by taking a reading off the cable at the top of
the borehole, casing or tube and by accounting for the distance from the
point of measurement to the nearest marking on the cable.
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Features
- Designed for measuring groundwater levels,
especially in small diameter tubes and piezometers
- Cable has a heavy duty jacket and stainless
steel inner conductor for strength
- Small diameter probe on narrow coaxial
cable
- The markers are chemically bonded to the
cable to prevent them from moving
- Rugged, free-standing reel
- Low cost
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Reel
The high quality reel has an easy access
battery drawer, an excellent brake, convenient carrying handle and a
sturdy, stand-alone design. It has been ergonomically designed to be
comfortable in use and stable when placed on the ground. It has an on/off
sensitivity switch, battery test button, self-rotating winding handle, a
light and a buzzer. The sensitivity control allows the buzzer to be turned
off while in cascading water, or when lowering to the bottom of a well. It
ensures a clear signal in both high and low conductivity conditions. The
transistorized, waterproof circuit board which powers the unit is located
in the hub.
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Probe Options
Stainless steel with a Teflon® tip and
stainless steel weights, with extra weights available. Recessed tip is
designed to minimize signals in cascading water
P1 1/4" dia. x 1.5" long
(6.4 mm x 38 mm) with 12 weights weighing 2.5 oz (70 g). - suitable for
accessing narrow diameters
P2 3/8"
dia. x 1.5" long (10 mm x 38 mm) with 10 weights weighing 5.7 oz (160
g). - heavier probe for situations where weight is more important than
size.
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Length Options
Stock lengths are:
100’, 300’, 500’, 750’ and 1000’ 30m, 100m, 150m, 250m, and
300m.
Other lengths are also available. The coaxial cable has a tinned copper
braided shield for flexibility and a stranded stainless steel central
conductor for strength. The cable jacket is of heavy duty polyethylene for
durability. Markings are at 5 ft. or 1 m intervals. The markers are
chemically bonded to the cable to prevent them from moving.
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