Fluke 931 Tachometer is a handheld tachometer that can accurately measure the rotational speed RPM, linear speed or surface distance of rotating objects per minute. It can perform non-contact speed measurement using the “infrared beam function, and contact measurement if using a connector and an optional speed probe. It is one of the commonly used tools in motor maintenance and electrical overhaul. Fluke full range of products with the latest date of 24 are available, welcome to consult and order.