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The SS300 Series are single set point speed switches with single pole, double throw (SPDT) relay dry contact output.
The trip point is set by a potentiometer. An LED indicates when the signal source is present. A second LED turns on when the trip point is reached. An optional time delay is on board to delay operation of the relay for 2-6 seconds after the set point has been reached. The SS300 Series speed switch is intended for installation within a weather- proof enclosure to protect it from rain, dust, etc.


  • Overspeed shutdown
  • Speed sensitive pull-in/drop-out
  • Engine and transmission alarms/shutdowns
  • Adjustable differential model