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Resizing the Top Mount Low Level Sensor
Certain applications may require the top mounted sensor to be shorter than factory length (see Figure 55: Top Mount
Low Level Sensor Assembly: Top Mount Low Level Sensor Assembly).
To resize:
1. Loosen and remove the strain relief gland nut and strain relief from the top of the sensor assembly.
2. Loosen and remove the 1/4” (6 mm) FNPT x 1/2-in (13 mm) tube compression fitting from the bottom of the as-
sembly.
3. Slide the sensor assembly out from the bottom being careful not to damage the wiring as it is pulled from the as-
sembly. DO NOT separate the 1/2-in inch tube from the 5/8” tube.
4. Loosen the compression nut from the 1/2-in (13 mm) FNPT x 5/8” (16 mm) tube compression fitting at the top of
the assembly.
5. Using a tubing cutter, remove an “equal” amount from the end of each tube (5/8” and 1/2”). You must cut off the
ferrule from both ends. Deburr the cuts using a fine emery paper.
6. Install a new 1/2-in (13 mm) compression ferrule on the end of the 1/2-in O.D. tube. Carefully thread the sensor
wire through the tube assembly.
7. Attach the 1/4” (6 mm) FNPT x 1/2-in (13 mm) tube compression fitting, with sensor attached, to the end of the
tube.
8. Install and tighten the 1/2-in compression nut (see Figure 47: Top Mount Low Level Sensor Assembly).
9. Install a new 5/8” (16 mm) compression ferrule on the end of the 5/8” O.D. tube. Carefully thread the sensor wire
through the flange and gasket assembly and install strain relief and strain relief gland nut. DO NOT tighten.
10. Install and tighten the 5/8” (16 mm) tube compression nut.
11. Slide the 1/2-in diameter tube in the 5/8” (16 mm) diameter tube and adjust the telescoping section until the de-
sired length is achieved, as measured from the bottom of the flange to the bottom of the sensor. Tighten the com-
pression fittings on the union to lock length setting.
12. Tighten the strain relief gland nut and strain relief.
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