ADS Environmental Services FlowAlert QR 775011 A2 - Manual (Page 50)

Pressure Depth Sensor and Float Switch Installation 3-27
½-Band Mount
Perform the following procedure to mount the pressure depth sensor
in a pipe using the ½-band mount:
1. Use a hacksaw to cut the band to the appropriate length. Cut
the band so that, when installed, it will run almost completely
down the left side of the pipe.
2. Determine the best location on the band to mount the pressure
depth sensor. The sensor should mount as close as possible to
the bottom of the band, making sure the sensor will be both
above the silt level and below the flow surface once installed.
3. Mount the sensor onto the inside of the band with two 4-40 x
5/16-inch countersink screws, making sure the pointed end of
the sensor faces the upstream edge of the ring. If holes do not
exist on the band at or near the desired mounting location for
the sensor or the sensor does not have screw inserts, use two
medium-sized cable ties to secure the sensor to the ring.
Crisscross the cable ties across the top of the sensor and
underneath the band.
Note: The edge of the band with the cable tie holes is the
downstream edge.
4. Secure the sensor cable along the downstream edge of the band
according to the instructions on page 3-29.
5. Place the band in the pipe upstream at least 12 inches from the
manhole invert. Position the band on the left side of the pipe so
that the sensor will remain below the flow surface (during
minimum flows) and above the silt level.
6. Orient the band so that one of the pre-drilled anchor bolt holes
is just above the flow surface.
7. Spot drill the pipe wall through the hole, install a ¼-inch x 2 ¼-
inch anchor bolt, and secure the band to the anchor bolt with a
washer and nut.