DT2234C Handheld Digital Laser Rev Counter Meter Non-contact Optical Tachometer

Resolution: 0.1 RPM (2.5 ~ 999.9 RPM), 1 RPM (over 1000 RPM). Test Range: 2.5 ~ 99.999 RPM (rate / min). Test Range Selection: Automatic. This restriction also applies to a fault that has arisen as a result of improper repairs by a service partner authorized by us.

eBay