Display flips when changing from optical to contact mode
These tachometers feature both contact and optical measurement capabilities. Memoty button holds last reading up to 5 minutes and recalls minimum and maximum readings. Display flips with the unit to help identify measuring mode. Model 87700-10 features a laser sighting for spotting targets up to 6 1/2 feet away. What's included: wheel set, four AA batteries, reflective tape, and carrying case.
Specifications
Range
Optical: 5 to 99,999 rpm Contact: 0.5 to 20,000 rpm, 0.2 to 6560 ft/min
Extech is the manufacturer. Please contact our technical application specialists for additional assistance (contact information can be found on the product web page).
Answered on 10/12/2009 by Jen from Technical Support
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