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REVGUARD 2 Speed Switch


The REVGUARD 2 Speed Switch continuously monitors engine RPM. In the event of an RPM overspeed condition, REVGUARD 2 transmits a signal to close the air intake shutoff valve to shut down the engine.  This new release is EMC compliant according to the following standards to prevent external signal interference that may false trip:  ICES/IEC 6100/FCC.  Our proprietary algorithm eliminates the need for external filters/resistors.

Features and Benefits

  • Field Programmability
  • Electronics are encapsulated for protection from fueld, moisture and dirt
  • Built-in Test Mode for simulating at reduced RPM without over revving engine
  • Can be connected to optional remote test switch and/or LED indicator light
  • LED light to indicate status
  • Output capable of sourcing up to 4A
  • Operates from 12VDC to 32VDC
  • Operating temperatures of -22°F to 167°F (-40°C to 85°C)
  • Screw Terminals for easy installation
Input power:

Supply voltage:

12-32 VDC

with reverse polarity protection

Input signal:

Frequency range:

Input signal type:


100 Hz - 10,000 Hz

Sine wave or square wave

  • Drilling rigs (onshore & offshore)
  • Drilling support equipment
  • Well servicing equipment
  • Refinery support equipment
  • Bulk haulers and tankers
  • Mining equipment
  • Construction equipment
  • Generator sets
  • Emergency response vehicles and equipment
  • Aircraft refueling equipment
  • Work boats
  • Barges
  • Agriculture equipment

REVGUARD 2 monitors engine RPM.

When engine RPMs exceed the REVGUARD 2’s set point, the REVGUARD 2 trips, sending an electrical signal to the Intake Air Shutoff Valve.