Electrostatic Products

Trek 347

Non-Contacting, Economical Electrostatic Voltmeter for Surface Voltage Measurements ±3 kV DC or Peak AC

Advanced Energy's Trek 347 electrostatic voltmeter uses a field-nulling technique that offers DC stability and high accuracy and eliminates the need for probe-to-surface fixed spacing. 

Measurement Range: 0 to ±3 kV DC or peak AC
Measurement Accuracy: Better than 0.05% of full-scale (monitor)
Speed of Response: Less than 3 ms for a 1 kV step (10 to 90%)

  • Overview
  • Technical Specs
  • Documents
  • Accessories
  • Service & Support
  • Distributors


The Trek® non-contacting electrostatic voltmeter provides precision and value for surface voltage measurements in the range of ±3 kV DC or peak AC. Its field-nulling technique allows you to accurately measure stationary or moving surfaces. And its patented probe design enhances noise and drift performance in the presence of contaminating particulate or under conditions of high humidity and / or wide temperature ranges.


  • Easily use for automated or computer-controlled systems
  • Operate on a benchtop, or with optional hardware, in a standard 19-inch rack
  • Utilize Digital Enable to turn the internal HV power supply on or off from an external device
  • Improve drift and noise performance
  • Choose from a large selection of optional probes (order separately)


  • Precision voltage monitor output
  • Low voltage replica of measured electrostatic potential provided for monitoring purposes or use as a feedback signal in a closed-loop system
  • Easy-to-read LED display
  • CE compliant

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

  • Performance

    Measurement Range

    0 to ±3 kV DC or peak AC

    Measurement Accuracy

    • Voltage Monitor Output: Better than ±0.05%
    • Voltage Display: Better than ±0.1% of full-scale, referred to
      the voltage monitor

    Speed of Response (10 to 90%)

    Less than 3 ms for 1 kV step

  • Voltage Monitor


    A buffered output provides a low-voltage replica of the measured voltage


    1/100th of the measured voltage (Other scale factors available)

  • Front Panel Meter

    Voltage Display

    3.75-digit LED display


    0 to ±3 kV


    1 V

  • Mechanical

    H x W x D

    108 x 233 x 357 mm (4.25 x 8.75  x 14 in)


    3 kg (6.6 lb)

  • Electrical

    AC Line Cord Receptacle

    Standard 3-prong with integral power switch and fuse holder

    Line Voltage

    Factory set for one of two ranges: 90 to 127 VAC or 180 to 250 VAC, at 48 to 63 Hz

    Power Consumption

    50 VA, maximum

  • Typical Applications

    • Surface voltage measurements of photoconductors or dielectric surfaces
    • Charge monitoring in semiconductor production
    • Measuring of electrostatic potentials on film, polymers, and paper

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.

Data Sheets


Non-Contacting Voltmeter Prober | Advanced Energy

Trek Non-Contacting Voltmeter Probes

We offer an assortment of probes with multiple views, shapes, and aperture sizes available. You can also choose from high temperature and resolution probes for extreme temperatures and critical measurements.

Documents & Support

View All Trek 347 Accessories

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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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