4
Section 1: System Description
Function and Theory
The Geotech ET Water Level Meter (ET WLM) is a portable instrument used to
accurately measure water levels in monitoring wells and bore holes. The sensor
consists of a stainless steel and PTFE probe attached to a reel-mounted,
polyethylene-coated engineer
’s tape. The engineer's tape comes in standard or
metric graduations, and is accurate to 1/100th of a foot, or 1 millimeter.
The sensor relies on fluid conductivity to determine the presence of water. An
audible signal and visible red LED activate when the probe contacts water. It
features adjustable sensitivity, used to prevent false triggering.
The ET WLM is intended for use as a depth to water measuring device. Using
the ET WLM for any other purpose may compromise safety of the operator
and/or void manufacturer
’s warranty.
To avoid damage to tape and strain relief, do not over tighten reel
with probe in storage position.
System Components
Figure 1-1
Summary of Contents for ET WLM
Page 1: ...Rev 04 22 2016 Part 12050062 ET Water Level Meter Installation and Operation Manual...
Page 2: ......
Page 7: ...5 Figure 1 2 Figure 1 3...
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Page 11: ...9 Figure 2 2 Fitting Optional Tape Weight Figure 2 3 Tightening Optional Tape Weight...
Page 17: ...15 Section 7 System Schematic Figure 7 1 Water Level Meter front view...
