EFS Series Surface Potential Sensors

TDK’s EFS series sensors eliminate the effects of disturbances in the electric field intervening between the photosensitive drum and the detection electrode

TDK’s EFS series sensors are feedback surface voltage sensors that support the improved image quality of color copiers and next-generation color printers with the reliability of ±0.05 V or below. The voltage sensors are constructed using high-stability output circuits that feed the detected photosensitive drum surface potential back to the electrical field control chopper and probe shield cover. EFS series sensors eliminate the effects of disturbances in the electric field intervening between the photosensitive drum and the detection electrode. They also show extremely stable and precise output performance where the adverse effects of temperature fluctuations and detection distance (probe positioning) are greatly reduced.

Features:

• Reliability of ±0.05 V or lower
• Available sensing distance of 1.5 mm to 3.5 mm
  • In this range, output voltage variation is small and robust output stability can be obtained despite changes in the ambient temperature
• Unique optimized structure and circuit design have achieved miniaturization and weight reduction, as well as greater performance in response to market needs
• Quick responsiveness of 11 ms which supports high-speed machines
• Extremely stable output performance is maintained for long periods of time through accurate driving made possible with the unique structural design and superelastic alloy chopper consisting of the piezoelectric element with optimized conversion efficiency
• Quick responsiveness to high-speed and high image quality needs

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