PHW's GPS Monitoring System works by continually comparing satellite-derived coordinates to coordinates in the cab signal system's onboard database. Warnings and brake applications can then be initiated if, for instance, a cab signal territory switch has been placed in the wrong position.

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PHW offers Key Lock Switches for a variety of on and off-vehicle applications. Each one is made according to the customer's unique requirements.

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Floor Heater Fault Detectors help prevent hazardous vehicle fires. Features include:
> Dual channel fault current monitoring for AC or DC loads up to 30A.
> Programmable trip threshold settings in .1A increments from .1 to 2A.
> Automatic reset capability after a trip.
> A programmable number of resets.
> Testability by maintenance personnel using a plug-in portable test unit.
> Both internal and external trip indicators.
> Small size (approx. 6.5"H x 2"W).

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PHW supplies Wiring Panels for a variety of vehicle applications. Each one is designed according to the customer's unique requirements. While most consist of relays and terminal strips, PHW has also produced panels with integrated microprocessor controls that can provide control and data recording functions.

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