Shimpo DT-105A Handheld Tachometer with 6" Wheel, LCD Display, 0.10 - 25000rpm Range Portable contact tachometer with a six-inch wheel for measuring the speed of motors, conveyor belts, and other moving and rotational systems Measures rotational speed, linear speed, surface speed, and total length for flexibility of use Measures the rate of speed and length in 16 different units for versatility of use Five-digit LCD screen presents test results and the unit of measurement Conforms to NIST standards for compliance with regulations, and CE mark indicates compliance with applicable EU directives