
I bought this unit after returning a unit that was about $10 cheaper but didn't work. This device gives me a very accurate RPM reading when reading the spindle RPM on a CNC router equipped with a spindle encoder and RPM reading. The speed comparison with the CNC machine was within 1% or better. I highly recommend spending the extra $10 on this device.

Handheld Digital Laser Tachometer Non-Contact RPM Meter Motor Speed Gauge Gun Measuring Range: 2
3 Review

Non-Contact Handheld Digital Tachometer for Precise Measurements
3 Review

FITNATE Non Contact Tachometer - Enhanced Accuracy with Battery Operation
3 Review

FITNATE Tachometer Batteries Reflective Instruction
3 Review