Dwyer's TAC-L tachometer measures rotational speed through reflections
Dwyer's Model TAC-L Portable Digital Tachometer measures rotational speed either by contacting a rotatable head to the shaft of the object, or using photo sensor to detect the reflections from the laser. The laser target can record from a distance of up to 20 inches and gives a more accurate measurement than LED targeting. Model TAC-L includes a large LCD with a backlight for use in dark areas. This tachometer is made of a strong, lightweight ABS plastic housing. Supplied with this model are 3 contact rotational heads, a contact surface wheel, and a protective carrying case.