Murphy Tachometer 10-32V with Hourmeter and SAE Bright Stainless Steel Bezel - ATH-30-B

The Murphy Tachometer ATH-30-B 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. 

This instrument is designed to function with Alternator, Magnetic Pickup or Ignition signals from pulses generated by an alternator with 4, 8, 12, 14 or 16 poles on the rotor (3 - 52 PPR); pulses obtained from the ring gear of an engine by means of an electromagnetic sensor (magnetic pickup). The instrument is designed to function with flywheels having anywhere from 50 to 300 teeth; 2 - 10 cylinder, 4 cycle spark-ignited engines. Not intended for use with Capacitive Discharge (CD) ignitions or magnetos, only for inductive, automotive-type ignitions.

This tachometer is powered by a 12- or 24-volt battery and are reverse polarity protected. It is used for negative ground, positive ground or isolated electrical systems and specially designed for use on truck, marine, industrial or stationary engines.

PRODUCT FEATURES:

• Improved quality
• New, easy one-button calibration procedure
• 12 & 24 VDC versions are included in one model number
• Every model will accept all signal sources: alternator, magnetic pickup or ignition
• Easy ring clamp for installation
• LED backlight, no bulbs to change
• RoHS Compliant

PRODUCT SPECIFICATIONS:

• Murphy Part No.: ATH-30-B
• Bezel: SAE Bright Stainless Steel Bezel
• 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
• Scale: 0-3000 RPM
• Case Material: Nylon, 12% glass filled
• Hourmeter Range: 99999.9 hours in 0.1 increments.
• Electromagnetic Compatibility: 2004/108/EC

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