Copper Surface Gauge.
The CMI 165 Copper Plating Gauge is a handheld coating thickness gauge that is specifically designed for PCB electronics manufacturers and copper platers who require quick, easy, accurate and repeatable measurements on hot or cold copper traces or panels.
Includes: CMI 165 Gauge, Integrated Probe, two AA batteries, protective case/belt clip, Quick Start Guide, Certificate of Calibration traceable to NIST, 1-year warranty