2 in 1 Digital Tachometer,Contact/Non-Contact Photo Tachometer RPM Tach Meter | 2.5-99,999 RPM Accuracy with Linear and Rotation Speed Measurement Wheels

Measurement Range: PHOTO/LASER ( 2.5 to 99, 999RPM); CONTACT ( 0.5 to 19, 999RPM); SURFACE SPEED ( 0.05 to 1, 999.9 m/min);
Laser Photo (non-contact): It measures the rotational speed (RPM) using a visible red light beam from a powerful LED. Just attach a reflective sticker to the rotating part and point the beam on the mark from a safe distance.;
Rotational Speed (contact): It measure the Rotational Speed (RPM) comes with contact tips that can be used to touch the rotating axle. This is great when a reflective tape cannot be attached, e. g. due to grease or water.; Use Microcomputer (CPU) and junction laser technique to combine Photo (RPM) and Contact Tachometer (RPM, m/min) into 1 meter;
Surface Speed (Contact): With the precision wheel you can measure meter per minutes (m/min). This is great for all kinds of belts. Conversion table to ft/min, inch/min included!