FW Murphy 20700166 SS300-12 Electronic Speed Switch, 12 VDC

The SS300 Series are single set point speed switches with 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.

Application:

• Overspeed shutdown.
  • Shuts down the engine if RPM exceeds the preset limit.
• Speed sensitive pull-in / drop-out.
  • Engage or disengage PTOs, four-wheel drives, other switch points, etc. according to the engine speed being monitored.
• Engine and transmission alarms/shutdowns.
  • Oil pressure in some engines and transmissions varies widely between running and idle speeds.
• Adjustable differential model.
  • The AD can be adjusted to change the speed range over which the pull-in and drop-out differential of the relay will operate. A typical application is to ensure that engine speed is above a minimum RPM before applying a load but allows a drop in speed of several hundred RPM without disconnecting the load.