DT-105A (LCD MODEL)
DT-107A (LED MODEL)
DT-105A-12 (LCD MODEL with 12" Circumference Wheel)
DT-107A-12 (LED MODEL with 12" Circumference Wheel)

Accurately measure rotational and surface speed, as well as length. Built-in selector switch permits the user to display readings in a wide variety of engineering units. The DT-105/7A-12 includes a 12" circumference measuring wheel which is offered for safer and easier surface speed measurement by keeping the users hand farther from the moving surface and slowing down the rotational speed.