Geotech Water Level Meter + Temperature

A portable instrument designed to accurately measure water levels and temperature in monitoring wells and bore holes.


WLM FaceplateThe Geotech Portable Water Level Meters + Temperature are designed to provide reliable and accurate measurements of groundwater levels and temperature. Readings are conveniently taken at the top of the casing with accuracy to within 1/100 of a foot and ± -0.5°C (temperature accuracy).

The sensor on the WLM consists of a stainless steel and PTFE probe attached to a reel-mounted, PVDF-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 millimetre.
The sensor relies on fluid conductivity to determine the presence of water. An audible signal and visible blue LED activate when the probe contacts water, and there is a mute button to silent the signal while probing for temperature. The reel features adjustable conductivity sensitivity to prevent false triggering.

For more information, contact your local Air-Met office. 


  • Mounted on a lightweight steel and aluminum storage reel for easy transportation and durability in the field
  • Highly accurate PVDF coated steel tape marked in engineering or metric increments
  • Field replaceable 5/8" (1.59cm) probe with stainless steel conductors for durability
  • Adjustable sensitivity to prevent false triggering
  • Audible and visible alarms activated when the probe makes contact with water
  • Easily replaced 9 volt battery
  • Water resistant padded carrying case to protect instrument (optional)
  • Optional tape weight helps sink probe into a deep or crooked well
Geotech Portable Water Level Meters + Temperature Specification
Size 100'-500' Reel
15" H x 11.5" W x 10.5" D
(38cm H x 29cm W x 27cm D)
  750'-1000' Reel
15" H x 11.5" W x 14.5" D
(38cm H x 29cm W x 37cm D)
  Probe 5/8" O.D. x 61/8" L (1.59cm O.D. x 15.56cm L)
Length & Weight 30m
Accuracy Tape 100th of a foot/100'
  Temperature Sensor ± 1°F (0.5°C)
Material Reel
Powder coated steel and aluminum
PVDF coated steel
PTFE and stainless steel
Power   9 Volt DC alkaline battery
Alarm   Audible and visual
Warranty   1 year
Certifications   CE Rated


  • Monitoring wells
  • Monitoring boreholes