Collection of pages from K&E catalogs for the 4225 family of Polar Planimeters


The 4225 is an Amsler style polar planimeter with means to measure mean height of indicator diagrams. Refer to page 311 of the 1913 catalog for a good description of the instrument.

The next page in the 1913 catalogs explains the method of finding the mean height of indicator diagrams with the 4225.

The following models are part of the 4225 family:


Of the catalogs available the 4225 polar planimeter first appeared in the 1895 catalog.

Links to catalog pages for the 4225 family of planimeters: