Extech Instruments Mini Laser Photo/Contact Tachometer With Nist RPM33-NIST. A microprocessor based quartz crystal oscillator tachometer the Extech Instruments Narrow Beam Tachometer is a durable and reliable way to get high accuracy RPM readings. The...
Extech Instruments Mini Laser Photo/Contact Tachometer With Nist RPM33-NIST. A microprocessor based quartz crystal oscillator tachometer the Extech Instruments Narrow Beam Tachometer is a durable and reliable way to get high accuracy RPM readings. The...