Description
The Extech 461891 is a contact tachometer. Surface wheels measure the contact surface speeds (from 10 to 9999 rpm) of rotating objects. The memory button retains the last reading and recalls max/min readings. Includes wheels for measuring linear surface speed (0.05 to 1999.9 meters/minute; 0.2 to 6560 feet/minute) or RPM. Includes tapered tip, flat tip, and spare wheel for surface speed measurements, four AA batteries, carrying case, and user manual.
Ref. 461891