Water Level Indicators


Durham Geo’s Water Level Indicators are used to measure water levels in standpipes and wells. Indicator consists of a probe, a cable, and a cable reel.

Water Level Indicators


Water Level Indicators consiss of a probe, a cable with laser-marked graduations, and a cable reel. The hub of the cable reel contains batteries, electronics, a bright LED lamp, and a beeper.

The operator lowers the probe into the standpipe or well. When the probe contacts the surface of the water, the LED illuminates and the beeper sounds. The operator then reads the depth-to-water measurement from graduations on the cable.

Indicator Controls

  • Sensitivity control provides consistent results in different well and water conditions.
  • LED and Beeper provide a positive indication of contact with water.
  • Test Button checks the batteries, beeper, and LED.
  • Battery Cover provides easy access to two AA batteries. Low power circuits provide excellent battery life.
Diagram of Controls for Water Level Indicator


  • Convenient Cable is easy to handle and winds up neatly on the reel. Steel conductors provide strength and excellent dimensional stability.
  • Laser-Marked Graduations are as durable as the cable itself. English unit cables have 0.01 foot graduations. Metric-unit cables have 2 mm marks.
  • Sturdy Reel is built for years of daily use. It features bronze bearings and aluminum plate sides.
  • Small Diameter Probe (9.5 mm – 3/8″) easily fits into most standpipes and wells. Weight can be attached to the probe tip.
water level indicator probe

About Laser-Marked Graduations

The photograph at right shows a water level indicator cable being drawn through the laser marking machine. The machine directs a laser beam at the cable jacket. The jacket changes color where the beam strikes, and the resulting marks and characters become a permanent part of the cable jacket.

manufacturing of laser-marked graduateions on water level indicators

For more information

Please download the datasheet and instruction sheet for the Water Level Indicator. These documents can be viewed and printed with Adobe Acrobat Reader.

If your water level indicator has seen a lot of use, you may be interested replacement parts. Laser-marked cables can also be retrofit to older indicators.

Water Level Indicators Specifications

ProbeStainless steel body and tip, polyethylene
insulator. 10 x 170 mm ( 3/8" x 6.6")
Cable3.2 mm ( 1/8" ) diameter polyurethane jacket with two copper-clad, steel conductors inside. Graduations are marked with laser and connot be rubbed off. Clean cable with laboratory grade detergent, such as Alconox® or Liquinox®
Reel ConstructionHeavy-gage aluminum plate sides, PVC spool, rotating knob. Larger reels are equipped with a stand made of strong steel tubing, a probe holder, and a reel brake
Sensitivity Controlprovides consistent results in different well and water conditions and helps eliminates false triggering
LED and beeperprovide a positive indication of contact with water
Test buttonis used to check the batteries, beeper, and LED
Battery coverprovides easy access to two AA
batteries. Low-power circuits provide excellent
battery life
CableReelWeightPart Number
100'7"3.5 lb51690010
150'7"4 lb51690014
100’9"5 lb51690012
150'9"5.5 lb51690015
300'9"7.5 lb51690030
500'11"11 lb51690050
1000'11"17 lb51690100
CableReelWeightPart Number
30 m180 mm1.6 kg51690303
50 m180 mm1.8 kg51690304
30 m230 mm2.3 kg51690300
50 m230 mm2.5 kg51690305
100 m230 mm3.4 kg51690310
150 m280 mm4.7 kg51690315
200 m280 mm5 kg51690320
300 m280 mm7.7 kg51690330