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Murphy Magnetic Sensor Analog Tachometer/Hourmeter ATHS-40-A

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Murphy 4000 RPM Magnetic Sensor Tachometer/Hourmeter 11-28 VDC w/ Black Stainless Steel Bezel - ATHS-40-A

Product Condition: NEW
Murphy 4K RPM Tachometer/Hourmeter with Black Stainless Steel Bezel ATHS-40-A
Estimated ship date: for orders by 3pm PT/6pm ET today Available for back order.

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The Murphy 4000 RPM Magnetic Sensor Tachometer/Hourmeter 11-28 VDC with Black Stainless Steel Bezel ATHS-40-A is a rugged, transistorized instrument with solid-state circuitry for indication of engine RPM. It is equipped with a bracket for mounting into a standard 3-3/8" (86 mm) dash mounting hole. A full 270° sweep of the pointer gives an accurate indication on a large easy–to–read scale and the dial can be illuminated for night reading. This model is equipped with hourmeter to record the elapsed running time of an engine. The ATHS-40-A is designed to function with flywheels having anywhere from 50 to 304 teeth.

This model is for negative ground, positive ground or isolated electrical systems and are protected against reverse polarity hookup. Powered by a 11-28 VDC battery and are reverse polarity protected.



  • 50-304 flywheel teeth
  • 4000 RPM – 0 to 100,000 hours
  • Sensing from Magnetic Sensor
  • High Visibility Analog Readout
  • Air Core Movement
  • Easy Calibration through Dip Switches
  • Through Dial Lighting
  • Black Stainless Steel Bezel



  • Part No.: ATHS-40-A
  • Scale: 0-4000 RPM
  • Case Material: Plastic
  • Bezel: Black Stainless Steel Bezel
  • Dial (Face Plate): 270o sweep with white numerals (over black background)
  • Power Input: 11-28VDC (70mA – 120mA except lamp load)
  • Backlight: 3.4W T-10 wedge base bulb
  • RPM Input Signal Voltage: 1.5Vrms minimum
  • Accuracy: Tachometer: +2% full scale; Hourmeter: +0.01% hours, +1 count
  • Temperature Range: -40oC to +82oC (no permanent damage shall occur)
  • Hourmeter Range: 99999.9 hours in 0.1 increments

Additional Information

Product Condition NEW
upc No

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