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10
MN301460 Rev A
Installation
Step Eight
THROUGH WALL INSTALLATION
Flowline’s Switch-Pro™ A_18 series may be installed through the side wall of a tank. The sensor has male 3/4"
NPT (3/4” G) threads on one side of a 15/16" wrench flat. This enables the user to select the sensor’s mounting
orientation, installed outside of the tank in.
ULTRASONIC ORIENTATION
Install the switch such that the gap is aligned up and down, allowing for liquid to easily leave the gap. Avoid
aligning the gap horizontally. This could allow material to collect on one of the flat surfaces in the gap. See the
illustrations below for further information.
VIBRATION ORIENTATION
Install the switch such that the forks are aligned up and down, allowing for liquid to easily leave the space
between the forks. Avoid aligning the gap horizontally. This could allow material to collect on one of the forks.
See the illustrations below for further information.
Warning
Do not squeeze the forks together. Doing so could damage or break the sensor and void the warranty.
Always install the Viton gasket with all versions of the AU18-_134 or AZ18-1134. The G threaded version
will not seal unless the gasket is properly installed.
INSTALL IN A DRY LOCATION
The controller housing is liquid-resistant and made of Polypropylene (PP). When installed properly, the controller
is not designed to be immersed. It should be mounted in such a way that it does not normally encounter fluid.
Refer to an industry reference to ensure that compounds that may splash onto the controller housing will not
damage it. Such damage is not covered by the warranty.