Protect Against Filter Element Bursting
Add a Differential Pressure Switch to the Gammon Gauge
Sound Alarm – Stop Flow – Turn on Second Filter
Normally Open or Normally Closed, Fail Safe

If differential pressure suddenly increases or a facility is operated without personnel monitoring the differential pressure, filter element failure can occur. This new switch is unique. It adds differential pressure control at a low cost using a non-powered proximity switch. This simple double-sealed switch is ideal for use in PLC (miniature computer) and relay controlled systems. The connection box is rated NEMA4X.

Control operations are also available if you don’t plan to use an external control. We have weather-tight and explosion-proof versions.

We strongly recommend a three-way test valve for properly testing the Mini Gammon Gauge and Proximity Switch and/or system.

Any Mini Gammon Gauge can be converted to include the new proximity switch.

Note: To meet IATA JIG Bulletin 58, order the “BKS” option for key switch reset and test functions. The ATA-103 does not require this. For vehicle mounting, we recommend the weather-tight housing.

Notes:

1. GTP-9980 has a normally open switch. The switch closes upon high differential pressure. If the cable to the controller is cut, high differential would never be detected.
2. GTP-9980B has a normally closed switch. The switch opens upon high differential pressure. If the cable to the controller is cut, the system would go into alarm notifying the operator that something is wrong with the system.
3. If a system is purchased without the controller (no enclosure), both types of switches are still available. When a complete system is ordered with an enclosure, it is our policy to provide a GTP-9980B fail safe system unless otherwise requested. The difference is in the internal wiring and components in the controller.
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