Benetech GM8905 Tachometer

A tachometer is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. The device usually displays the revolutions per minute (RPM) on a calibrated analog dial, but digital displays are increasingly common.

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Main Features
Hold the maximum value, minimum value, average value, and the last measured value.
Fully display operation instruction and unit symbol, which is concise and explicit wide measuring range and high resolution
Battery low power indication, LCD backlight display, and auto shutdown.
Adopt the latest microprocessor technology and laser technology which enables the instrument to be more intelligent and reliable.
Oversized screen LCD Display with clear indication.
Solid and dedicated structure. The entire machine adopts durable and optimized electronic elements.
Technical Specifications
LCD Display 5 digit large-screen LCD display with word height of 18mm
Unit rpm
Range 2.5-99999rpm
Resolution Ratio 0.1rpm(2.5-999.9rpm) , 1rpm(1000-99999rpm)
Basic Precision ±(0.1%n+5d)rpm;(2.5-999.9rpm)
Laser power Class ii 2-5mw
Sampling Ratio Once/second
Measurement Distance 50-500 mm
Time Base Quartz Crystal
Automatic Shutdown The instrument will shut down after 60 seconds without any pressing
Operation Environment 0ºC~50ºC; (32ºF to 122ºF);10%-90% R.H
Storage Environment -10ºC to 80ºC; (-14ºF to 176ºF) ;10%-75% R.H.
Power Supply 2×1.5V AAA Battery
Dimensions 55.7×29.9x127mm
Weight 106gms

Equipped with 3 bars of Silver Reflection Tag (200mm*12mm)