Doc. No.: M1500, Rev. 6
Page 55 of 127
• 67733 Gross Point Road 900 Santa Fe Dr.
30-3221-2 Dual Level Reservoir Sensor
About the 30-3221-2
The dual-level reservoir sensor is designed for use in the brine-filled reservoir of the interstitial area of a
doubled-walled tank. This sensor contains a dual-level float switch that detects level changes of fluid in the
reservoir of the tank. The sensor expects the liquid to be at a constant level. The system will activate the alarm
when the brine level in the interstitial space either rises or falls.
It can also be used in other areas (such as dispenser containment pans) that are normally dry and will give a
low level warning followed by a high level alarm. In the event of a break in the cable, the system will activate
the alarm
–20 C to +50 C (–4 F to +122 F)
6 cm (2.4 in) dia. x 35.6 cm (14 in) long
4.5 m (15 ft) gas & oil resistant
NOTE: To ensure safe operating conditions the sensor has been designed to connect to OPW Fuel
Management systems only.
14.1.1 Installing the 30-3221-2
See the Local and National Electrical Codes for your location. Make sure that
the cabling leading back to the controller (gas/oil resistant Petro Vend number
12-1030) is installed in conduit dedicated to intrinsically safe wiring.
NOTE: To change the logic for this sensor the lower float can be reversed.
To remove the lower float:
1. Use needle-nose pliers to remove the bottom clip.
2. Remove the plastic cover and the float clip.
3. Remove the float.
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