Electrostatic Products

Trek 520 Series

Hand-Held Electrostatic Voltmeters for ESD Applications

Advanced Energy's Trek Model 520 (±2 kV) and 523 (±20 kV) hand-held electrostatic voltmeters provide accurate, non-contacting measurements of electrostatic surface voltage. Both are ideal for ESD applications in either ionized or non-ionized environments.

  • Measurement Range 
    • 520: 0 to ±2 kV DC
    • 523: 0 to ±20 kV DC
  • Measurement Accuracy: Better than ±5% of full scale over the recommended probe-to-surface spacing
  • Recommended spacing
    • 520: 5 to 25 mm
    • 523: 30 to 60 mm
  • Overview
  • Technical Specs
  • Documents
  • Service & Support
  • Distributors


The Trek® 520 voltmeters are not your typical hand-held field-meter. Their measurement technology provides surface voltage measurements that are essentially independent of the sensor probe-to-measured surface spacing.

Trek 520 is available in two versions. The 520-1 has a digital meter to display the measured voltage. The Trek 520-2 has an analog output monitor in addition to the digital display. This analog output monitor can be used to record the measured voltage or to view it on an oscilloscope. Always use the original grounding cord without any safety resistor; failure to do so will lead to measurement errors.


  • Accurately measure surface voltage at a wide range of spacings
  • No need to maintain a fixed spacing


  • Chopper stabilized for drift-free operation in ionized environments
  • NIST-traceable Certificate of Calibration provided with each unit

Select specifications are shown below. Please see product data sheet for additional specifications.

  • Performance

    Measurement Range

    • 520: 0 to ±2 kV DC
    • 523: 0 to ±20 kV DC

    Measurement Accuracy

    Better than ±5% of full-scale over the recommended probe-to-surface spacing


    • Drift with Time: Less than 600 ppm/hour, noncumulative
    • Drift with Temperature: Less than 600 ppm/°C

    Operating Time

    Approximately 8 hours with a full battery

    Sampling Rate

    2.5 readings per second

  • Mechanical

    H x W x D

    31 x 59 x 173 mm (1.2 x 2.4  x 6.8 in)


    200 g with battery (7 oz) with battery

  • Typical Applications

    • Measurement of electrostatic surface charge build-up
    • Manufacturing processes
    • Electronic assembly testing
    • Semiconductor material testing
    • Dissipative material testing
    • Automotive electronics testing
    • ESD Auditing and troubleshooting

Specifications are subject to change without notice. Not all options and accessories are available for all models and configurations. Dimensions listed generally refer to standard configurations and module bodies only. Please confirm technical specifications and customizations with a sales representative. Advanced Energy is not responsible for errors or omissions.

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Product Support

U.S.: +1 800 446 9167
Asia: +86 29 8874 1895
China: 400 8899 130
EMEA: +44 800 032 1546
U.K.: 08000 321 546

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