Fluke certainly makes excellent equipment. But my friend bought a $40 Port Cargo speedometer and it worked the same as a $360 Fluke 930.
Pros
<p>Product overview: Fluke 930 Non-Contact Tachometer The Fluke 930 is a handheld tachometer that resembles the Fluke 931 with minimal configuration and can accurately measure revolutions per minute (RPM) or surface speed and distance. With only non-contact measurement function, it is more affordable and offers stable quality. Applications: Heavy industrial environments eg automotive, textile, pulp and paper, metal processing, water treatment plants, mechanical engineering and chemical plants, HVAC compressors for industrial systems </p>