Optical/contact model - instrument equipped with removable head for contact and distance rotating pieces checking procedures by using a laser beam and a small portion of reflecting seal tape applied onto a rotating workpiece; storage device enables a display viewing after last measurement reading and min/max values. Optical model only for laser beam measurements.
Power supply: 4 AA-type 1.5 batteries (included).

Main features:
- 2.5 rpm ÷ 99.999 (optical) measurement range
- rpm 0.5 ÷ 19.999 measurement range (contact measurements)
- m/min 0.05 ÷ 1999.9 measurement range (tapeline measurements).