Photo/Contact Tachometer

461895 Photo/Contact Tachometer.Accurate to 0.05% with max resolution of 0.1rpm in either photo or contact mode. Complete with tips and wheel for rpm or linear surface speed,four 1.5V AA batteries, reflective tape and carrying case
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Mini Laser Photo Tachometer Counter

461920 Mini Laser Photo Tachometer Counter. Laser Light Source used for greater accuracy and longer measuring distance. Non Contact. Last reading and min/max readings.RPM Range 2 - 99,999 RPM
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