The DT-311D stroboscope provides the illusion of “stopped motion.” By adjusting the strobe’s flash rate, equipment appears to be standing still or in slow motion. The stroboscope also measures rotational (RPM) or reciprocating (strokes per minute) speeds with the same precision as an electronic digital tachometer. Ideally suited for printing inspection, motion analysis, preventive maintenance, and speed measurement of repetitive motion. The strobes provide timely data on vibrating parts, leaks, spray patterns and a variety of industrial and scientific operations. It is extremely easy to maneuver and operate via its lightweight and compact design and simplified user interface. Its rugged metal construction provides unequaled reliability in the harshest environments.