461891 - Contact Tachometer Fast and accurate rpm and
surface speed measurements to 20,000rpm - 0.05% basic
accuracy
461923 - Laser Photo Tachometer Non-contact rpm measurements to
99,999rpm with laser - distance up to 6.5ft (2m)
461893 - Photo Tachometer Non-contact rpm measurements to
99,999rpm with integral light beam - distance up to 6"
(152mm)