The measuring wheel rides directly on the measuring surface. Furthermore, all models are equipped with a vernier magnifier and with a zero set wheel . It is optional with models 10 and 20 and standard with Model 30. Features like a tilted body design and a parallax free tracer lens permit convenient operation without the need to bend over the instrument during tracing and readout. While the Model L10 and N 10 is optimized for maximum accuracy, Model L20 and N 20 is configured for maximum measuring range.
M feature metric calibration .
Model 30 planimeters are equipped with adjustable pole and tracer arms which enables the user to optimize the instrument for both, maximum precision and measuring range. A tilt body design and a parallax free tracer lens permit convenient operation without the need to bend over the instrument during tracing and readout. The L30 Model is also equipped with a rotating cursor to compensate for uneven table surfaces. The tracer lens is flat to permit parallax and reflex free viewing from convenient seating positions. An attachable magnifier can be dropped into the cursor recess to enlarge the thickness of the lines being traced.