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Murphy Electronic Speed Switch Adjustable Differential SS300-AD-24

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Murphy Electronic Speed Switch 24V Adjustable Differential - SS300-AD-24

Product Condition: NEW
Murphy Electronic Speed Switch 24V Adjustable Differential with SPDT Relay Dry Contact Output SS300-AD-24
Estimated ship date: for orders by 3pm PT/6pm ET today Available for back order.

SSL Cerficate

The Murphy 24V SS300-AD-24 is a single set point speed switch 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. An optional time delay is on board to delay operation of the relay for 2-6 seconds after the set point has been reached. This adjustable differential model SS300-AD-24 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 insure 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.

The SS300-AD-24 speed switch is intended for installation within a weather- proof enclosure to protect it from rain, dust, etc.


  • Solid State Construction
  • Compact Design
  • Field Adjustable Set Points
  • High Noise Immunity
  • Adjustable Differential



  • Part No.: SS300-AD-24
  • Case: Black, ABS plastic
  • Time Delay: When terminal 7 is grounded, the relay operation is delayed for 2-6 seconds after rpm set point is reached
  • Adjustment: 20–turn potentiometer(s)
  • Temperature Range: -4° to 185°F (-20° to 85°C)
  • Relative Humidity: 0 to 95% Non-condensing
  • Power Requirements: 24 VDC (18-30 VDC)
  • Output: Relay contact, SPDT, resistive load, 6 A, 30 VDC
  • Frequency Signal (Minimum Input Voltage Signal): 4.5 Vrms
  • Frequency Signal (Maximum Input Voltage Signal): 50 Vrms
  • Frequency Range in Hz: 625-9000
  • Maximum Current Pull In: 46 mA
  • Maximum Current Pickup only: 16 mA
  • Reset Differential Magnetic Pickup: 650-8900 Hz Adjustable
  • Shipping Weight: 0.24 lb. (108 g)
  • Shipping Dimensions: 8 x 4 x 4-1/2 in. (203 x 102 x 114 mm)

Additional Information

Product Condition NEW
upc No

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