Collection of pages from K&E catalogs for the 4215 family of Radial Planimeters

Description:

The Radial Planimeter is specifically designed for finding the mean value of circular indicator diagrams.

The following models are part of the 4215 family:

History:

The 4215 Radial Planimeter first appeared in the 1921 catalog.

Links to catalog pages for the 4215 family of planimeters: