The RPM10-NIST is a combination tachometer which provides both contact and non-contact RPM measurements, making this device useful in virtually all applications. The RPM10 also features a built-in IR thermometer with laser pointer for measuring surface temperature from -4 to 600 degrees F (-20 to 315 degrees C), making it ideal for checking the operating temperature of motors, bearings and machinery. Complete with wheels for linear surface speed (0.2 to 6560 ft. /minute; 0.05 to 1999.9 m/minute) or RPM measurements, 4 AA batteries, 23 in. (0.6 m) reflective tape, carrying case, and user manual. Includes certificate traceable to NIST.