The TKRT 25M is a mechanical, hand-held tachometer that uses precise contact measurement to determine rotational and linear speed. It provides fast, easy monitoring of machinery such as engines, shafts and conveyer belts. The instrument fits in one hand, requires no batteries and has a large dial gauge display ? making it easy to read. As well as being compact and sturdy, the TKRT 25M is supplied with a full set of contact adaptors.