Users’ Manual
ESM-12S Digital seepage monitoring system
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Two clamps with expandable fasteners are provided to fix the PVC perforated pipe on the wall. Mark
position of holes on the clamps for expandable anchors at the selected installation location. Drill 8 mm
diameter holes 75 mm deep to fix the PVC perforated pipe with clamps, using Hilti M8x75 mm
expandable anchors or equivalent, as shown in figure 4-2.
There should not be any perceptible fluctuations in the free surface of the flowing water. If necessary,
tranquilize the flow in the channel by introducing a
tranquilizer
upstream (client’s scope) from the
measurement device in the direction of the flow.
4.2.1 Points to be considered while installation of V notch and seepage sensor
Use sealing compound to make junction box watertight.
The upstream face of the weir plate should be smooth and in a vertical plane perpendicular to the axis
of the channel.
The distance from the bottom of the approach channel (weir pool) to the crest should preferably be at
least twice the depth of water above the crest, but not less than 30 cm.
Sensor assembly
PVC pipe
Clamp with
fasteners
Air vent tube
Digital signal
3 core cable
To Digital
Datalogger
JB
Desiccant unit
(Moisture trap)
Wall mounting plate
with fasteners
WALL
Sectional view
Min. water level
Figure 4-2 Typical installation of model ESM-12S/1 digital seepage monitoring sensor
