Similar to 70865 but also comes with a shaft which rotates to measure RPM and surface speeds. Labs use this high accuracy unit to check speeds of centrifuges, motors, or stirrers. Five digit LCD is a vivid 0.5-inch high display. Using a precision quartz crystal the tachometer takes only three seconds for most readings. A unique memory feature permits recalling the highest, lowest, and last reading. One end of the unit provides contact readings with a rotating spindle. The other end makes touchless readings using a beam of light, which reflects off of self-adhesive tabs to provide readings of 0.1 to 99,999 revolutions per minute.
The contact end of the instrument measures speeds of 0.1 to 19,999 revolutions per minute, 0.05 to 1999.9 meter per minute, and 0.2 to 6560 feet per minute. Resolution in all modes is 0.1 below 1000 and 1 above 1000. Accuracy is ±1 digit or 0.5%. Utilizes a precision quartz crystal for accurate time base. Comes with four AA alkaline batteries. Traceable® Certificate, rugged ABS case, self-adhesive reflecting tabs, internal light, cone for RPM, wheel for RPM, wheel for surface speeds, and carrying case. Size is 2-1/2 x 8-1/2 x 1-1/2" and weight is 10-1/2 ounces. Replacement battery Cat. No. 30580-01.
