This document describes the features and characteristics of the EFS series Surface Potential Sensors. This voltage sensor is a feedback type sensor that supports improved image quality in next-generation color printers. It is constructed using TDK's unique, high-precision, and highly stable detection circuit, which feeds the measured photosensitive drum surface potential back to the electrical field density control chopper and probe shield cover. The output of this sensor is highly precise and stable, and is almost unaffected by temperature fluctuations or probe spacing. It greatly reduces the adverse effects of electrical disturbances between the photosensitive drum and the sensor electrode.
