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Tank Level Sensors (RMA-FTL1-SEN & RMA-FTL2-SEN, RMA-WTL1-SEN & RMA-WTL2-SEN)
Dual Switch Point
The Tank Level Sensors have a high and low switch point with a differential in between.
While the float moves through the differential, its switch state remains unchanged until it
hits the high or low point, as shown below. You may adjust the height of this differential
by moving the weight closer to or further away from the float.
When the float switch
is on its way up, the
switch remains in the
same state until it
reaches the high point.
Differential
When the float switch
is on its way down,
the switch remains in
the same state until it
reaches the low point.
Differential
Install Your Tank Level Sensor
Do not use this sensor in hazardous (classified) locations or life safety applications.
Step 1: Mount your Tank Level Sensor.
You may use the attached polypropylene hanging clamp to hang your Tank Level Sensor.
The PVC-coated cable may be hung down a wall or in a corner of the tank—it does not
have to be suspended from the center. Allow a swing radius for the float that is equal to
the distance between the control weight and the face of the float.
Note that the height and depth (in feet and inches) at which the float switch changes state
depends on two factors:
•
the height at which the float is suspended in the tank by the hanging clamp
•
the distance between the float face and the control weight (which creates the
differential)
You may wish to experiment with different combinations to get the results you desire.
When considering the layout of your components, remember that the speaker wire cannot
withstand the same conditions as the PCV-coated cable attached to the float. Do not run
the speaker wire inside the tank or immerse it.
