3.4.4. Sensor Mounting Systems
All sensors can be attached to a mounting plate, spring or scissors rings. The sensor is first attached to a carrier to be slid onto
any of the compatible mounting systems. This maintains a height suitable for measuring flow rates and velocities at very low
water levels. To install the sensors in rectangular, trapezoidal or earthen channels, use the sensor mounting plate. Stainless
steel spring rings simplify sensor installation in cylindrical pipes. Six standard diameter sizes from 8…24 in. (200…600 mm)
are available. Before entering the manhole, the sensor and the cable can be fastened in place to the downstream edge of the
ring. The self-expanding device sits tight by expanding the band for a friction fit inside the pipe. The adjustable scissors ring
is installed in large diameter pipes from 20…57 in. (500…1450 mm). It consists of a base section and one or more pairs of
extensions to fit the size of the pipe and a scissors mechanism.
Pipe
Tension ring with pre-drilled holes to fasten
sensor cable to the ring
Area velocity sensor on sensor mounting plate
Figure 5: Example for sensor mounting system (tension ring) in a pipe
Product Description
Page 15 March 2021 HYB-UM-03155-EN-03
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