Frank W. Murphy Tachometers and Tach/Hourmeters - AT and ATH Series

• 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” 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.
• These instruments are 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.
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.
• Power input: 10-32 VDC.
• Backlight: LED, red.