CT-6520 Universal digital engine tachometer.
A variety of engine types can be handled easily by simply selecting the detector.

When using the CT-6520 in combination with an Ono Sokki detector, rpm
measurement can be performed on virtually any engine type. The CT-6520 is
used for research and / or production measurement of rpm on gasoline & diesel
engines (two / four cycle engines having from one to eight cylinders) or
component shafts.

A selector switch can be used to specify the type of engine to be measured,
optimizing measurement conditions for the particular detector to be used.

The CT-6520 uses a multiplier circuit to both reduce the measurement time and
achieves high accuracies to 0.02% of full scale.

With a measurement range of 400 to 19,999 rpm, the CT-6520 uses a 5-digit
large green LED to display the actual rpm being taken.

The number of input pulses per revolution can be set in the range 0.5 to 199.5 p/r
in 0.5 p/r steps.

Powered by both AC and DC, the CT-6520 can be used in the lab, on the
production line, or during in-vehicle testing.

A variety of detectors and detection methods support measurement on virtually
any engine type (or other rotating bodies). This tachometer will meet all of your
engine rpm measurement demands, whether your rpm application calls for:

An ignition pulse detector that clamps around the ignition coil to detect the spark
signal of the ignition system,

Using an electromagnetic detector that measures rpm on engines having a
magneto-type ignition system,

Photoelectric sensor used to detect the presence of a reflective mark affixed to a
rotating part on an engine.

Magneto type vibration detector that detects the vibrations caused by a
reciprocating up and down movement of the piston,

Or a magnetic detector mounted near a gear attached to a rotating shaft, and
output signal having a frequency proportional to the rpm.

Pulse, analog, and digital outputs are provided as standard, to interface to
recorders, spectrum analyzers, computers, or other data acquisition systems.