If you need a portable, handheld tachometer, take a look at the HT-4100 ... range for fast and safe measurements with 1-rpm accuracy. The HT-4100 can measure up to 50,000 rpm.

UNI-T UT373 Mini Digital Tachometer, 10~99999 RPM Non-Contact Tachometer Speed Meter Speed Gauge with Backlight, Max/Min/Data Hold, Rotating Speed/Count Function Switching ...

The SHIMPO DT-100A series battery-powered handheld tachometers offer superior accuracy and capabilities ... combination contact/non-contact units that enable precise non-contact RPM measurement up to ...

Abbott Enterprises has now made a available its band of light Bolt tachometer. This device will let the user determine an engine's exact rpm at a glance Abbott Enterprises has now made a available ...

Many cars have a tachometer to indicate engine rpm, usually measured in thousands. At the top of the tachometer range is a zone called the redline — usually highlighted literally, with a red line.