Q.Are there any documents that give an outline of magnetic toner density / quantity sensors TS series?

Sensoren und Sensorsysteme >  Tonerdichte /Tonermenge-Sensoren >  Magnetische Tonerdichte /Tonermenge-Sensoren

A. The toner density/quantity sensors use a differential transformer optimized for toner detection to detect small changes in the magnetic permeability of the toner density and residual quantity. This enables high-accuracy control of printers. Please refer to the available product overview that explains the products and technology in the TS series.