PAL-AT Installation Manual
62
Figure 9-2
Typical Conduit Connection Detail
9.4 PHLR Hydrocarbon Probe
The PHLR series is a reusable hydrocarbon probe that detects hydrocarbon liquids in sumps, interstitial
spaces of pipes and any other areas where hydrocarbon liquids can accumulate to a depth of ¼” [6 mm].
The probe is designed to detect fuels (gasoline, diesel fuel, jet fuel, crude oil, etc.) and many hydrocarbon
solvents. The probe is reusable by cleaning or replacing the sensor elements. There are two models of
the PHLR probe available:
The standard PHLR is designed for non-pressurized locations such as sumps, manholes, and non-
pressurized containments. The PHLR can be installed in any orientation – vertical or horizontal.
The PHLR-P is designed for pressurized containment applications. This model is ideal for typical
sealed, containment piping systems that are maintained under pressure with a nitrogen or air blanket.
The PHLR-P should be installed in a vertical orientation. The PHLR-P has vent holes that must not
be submerged in a liquid before the containment is pressurized (see figure 9-4).
An extension to the probe housing can easily be added with standard ¾” Schedule 40 PVC pipe to
accommodate installation requirements.
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