Doc. No.: M1500 Rev. 5
Page 70 of 127
• 67733 Gross Point Road 900 Santa Fe Dr.
Doc. No.: M1500, Rev. 5
Page 70 of 127
67733 Gross Point Road 900 Santa Fe Dr.Doc. No.:
M1500, Rev. 5
Page 70 of 127
• 67733 Gross Point Road 900 Santa Fe Dr.
•
Cleaning the Hydrocarbon Liquid Sump Sensor. To clean hydrocarbon contamination from the sensor from
testing or actual use, immerse the contaminated portion in denatured alcohol for one hour. Then, flush the
sensor with water to remove any residue. Leave the sensor to “settle” for another hour. The sensor should
return to nearly its original resistance, but it may be necessary to re-adjust the Controller’s thresholds.
1.29 30-3225 Combo Dual Level/Hydrocarbon Liquid Sump Sensor
About the 30-3225
This sensor is made from the hydrocarbon liquid sump sensor (30-3219-12) and from the dual level reservoir
sensor (30-3221-2) clipped to the side. The combination sump sensor is designed to detect the presence of
liquid hydrocarbons and water in sumps, dispenser pans and other locations where the presence of a liquid
could indicate that a leak has occurred.
The sensor contains a carbon/polymer material that changes its resistance when exposed to liquid
hydrocarbons. The dual float switch simply clips onto the hydrocarbon sensor and can activate in the presence
or absence of liquid. This sensor can be used to monitor wet wells to ensure that liquid is normally present. In
the event of a break in the cable, the system will activate the alarm.
NOTE: To ensure safe operating conditions the sensor has been designed to connect to OPW Fuel
Management Systems’ controllers only.
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