• Murphy by Enovation Controls

AT / ATH Tachometers

The AT Series tachometer is a rugged instrument with solid-state circuitry for indication of engine RPM.

It is equipped with a ring nut for mounting into a standard 3-3/8 in. (86 mm) dash mounting hole. A full 240° sweep of the pointer gives an accurate indication on a large easy–to–read scale, and the dial can be illuminated for night reading. The ATH Series model is also equipped with hourmeter to record the elapsed running time of an engine.

  • Improved quality
  • New, easy one-button calibration procedure
  • Every model will accept all signal sources: alternator, magnetic pickup or ignition
  • Easy ring clamp for installation
  • LED backlight
Specifications Downloads How to Order
Specifications Drawer: 
  • Power Input: 10-32 VDC (100 mA max at 32 VDC, does not include backlight)
  • Backlight: LED, Red (75 mA max at 32 VDC)
  • Accuracy:
    • Tachometer: +2% full scale
    • Hourmeter: +/- 0.02%
  • Temperature Range: -40 to 185° F (-40 to 85° C)
  • Dial (Face Plate): 240° sweep with white numerals
  • Bezel: 304 stainless steel
  • Scale: 0-3000 RPM
  • Case Material: Nylon, 12% glass filled
  • Hourmeter Range: 99999.9 hours in 0.1 increments.
  • Electromagnetic Compatibility: 2004/108/EC
  • IP66 front and IP32 back (vented case)
  • RoHS Compliant

WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information about California Propsition 65, go to www.P65Warnings.ca.gov or visit our California Proposition 65 page.

Additional product documentation can be found on our product support website or by clicking the Help Center button above.

Part NumberModel/DescriptionNotes
20700245AT-30 TachometerBright Stainless Steel Bezel
20700246AT-30-A Tachometer Black Stainless Steel Bezel
20700247AT-30-B TachometerSAE Bright Stainless Steel Bezel
20700248AT-30-C TachometerSAE Black Stainless Steel Bezel
20700249ATH-30 Tach/HourmeterBright Stainless Steel Bezel with Hourmeter
20700250ATH-30-A Tach/HourmeterBlack Stainless Steel Bezel with Hourmeter
20700251ATH-30-B Tach/HourmeterSAE Bright Stainless Steel Bezel with Hourmeter
20700252ATH-30-C Tach/HourmeterSAE Black Stainless Steel Bezel with Hourmeter
20700254ATH-40-A Tach/Hourmeter4000 RPM Black Stainless Steel Bezel with Hourmeter