Sealey Contact/Non-Contact Digital Tachometer

- Professional quality laser instrument for fast and accurate measurement of rotational speed with or without contact. - Will also measure total revolutions, frequency, surface speed and distance. - 10 Selectable data set memories each with maximum, minimum and average or single value reading, as appropriate. - Supplied with reflective tape, for non-contact measurement, and three heads for contact measurement. - Powered by 9V battery (supplied) and has jack socket for 6V DC supply.