Large-displacement keys for selecting presets are a feature of Type 250. The unit has a 5-digit display and is available as a subtracting revolutions, length or stroke counter. The large-format display with its 6.5 mm figures facilitate read-off. The integrated reset button is a further useful feature.

Outstanding readability is a characteristic of the Type 312. It has a 7-digit display with 8 mm figures, and stands out because of its many application options. Type 312 is a stroke counter.