The Extech 461891 high precision contact tachometer can make contact measurements of rotating objects or measure linear surface speeds in ft/min or m/min. The Extech 461891 high precision contact tachometer has range of 0.5 to 20,000 rpm for rotating objects or 0.2 to 6560 ft/min for linear surface speeds and a basic accuracy of ±0.05% of the reading. The Extech 461891 high precision contact tachometer can also recall LAST / MAX / MIN values.

The Extech 461891 high precision contact tachometer comes complete with cone tip, flat tip and spare wheel for surface speed measurements, four 1.5V AA batteries, and convenient carrying case.