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3.61 Submersible Sensor Installation
The sensor can be submerged into an aeration basin if it has been supplied with cable waterproofing.
Do not simply submerge the sensor into the water by the cable. Use the rear mounting threads on the
sensor body to attach a pipe or other device to secure the sensor.
The sensor should be mounted at a 15-45 degree angle to prevent
an internal air pocket from contacting the sensor tip resulting in
erratic and unreliable readings.
The sensor should be placed at least 2 feet from the wall or side
of the basin, and completely submerged at least below the
surface.
You may need to install the sensor into a stilling well in order to
meet the less than 0.5 ft/sec. flow velocity requirement of the
sensor for stable readings and to extend sensor life.
Sensor cables should be installed in conduit to avoid interference of low level sensor signals.
Snap cable extensions
are available for cable runs longer than 20-feet. One cable half remains
permanently wired to the fluoride transmitter, the other half is permanently attached to the sensor and
sealed. The two cables are joined with a pin connector.
To disconnect, turn the lock collar counterclockwise to unlock, then pull the connectors apart. To
connect, push the connectors together lightly while rotating them slowly until the internal pins align and
the connectors snap together. Rotate the lock collar clockwise to seal and lock the connector halves.
3 Installation
