Extech Combination Contact, Laser Photo Tachometer, Extech Instruments (CAT#: STEM-AIAE-0031-LKN)

Quickly measure RPM, surface speed and length with one tool. Use the contact wheel for up-close readings or laser mode for safer, non-contact measurements up to 1.6ft (0.5m) away. Store/recall 10 data sets in memory with 4 parameters (measurement, max, min and average). Supplied with contact wheel for rpm or linear, surface speed/length, 9V battery, refl ective tape and soft case.

Size: 6.2 in. × 2.3 in. × 1.6 in., 160x60x42 mm
Weight: 5.3 oz (151 g)

Large 5 digit backlit LCD display.
Microprocessor based with quartz crystal oscillator to maintain high accuracy.
Provides wide RPM (photo and contact) and Linear.
Surface Speed/Length (contact) measurements.