Electrostatic Products

Trek 370

Precision, Non-Contact Electrostatic Voltmeter

Advanced Energy's Trek 370 stable electrostatic voltmeter features the unique capability to take non-contact surface voltage measurements in the range of 0 to ±3 kV DC or peak AC.

  • Very High Speed of Response: Less than 50 ms for a 1 kV step
  • Measurement Range: 0 to ±3 kV DC or peak AC
  • Measurement Accuracy: Better than 0.05% of full-scale
  • Overview
  • Technical Specs
  • Documents
  • Accessories
  • Service & Support
  • Distributors


The Trek® 370 employs an electrostatic field-nulling technique to achieve high DC stability and high measurement accuracy — regardless of probe-to-measured surface spacing changes. This permits highly accurate stationary or moving-surface measurement without fixed-spacing. An automatic gain feature eliminates the need for manual adjustment when changing probes or probe-to-surface distance. A precision voltage monitor provides low voltage representation of the measured electrostatic voltage for external monitoring purposes, or use as a feedback signal in a closed-loop system.


  • Eliminate the need for manual adjustment with automatic gain feature
  • Operate on a benchtop or, with optional hardware, in a standard 19-inch rack
  • Utilize one-step, push-button zeroing


  • Automatic gain
  • Zero control
  • Voltage monitor output
  • Electrostatic field-nulling technique

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

    At the Voltage Monitor: Better than ±0.05% of full-scale
    At the Voltage Display: Better than ±0.1% of full-scale ±1 count, referred to the voltage monitor

    Speed of Response (10% to 90%)

    Less than 50 ms for a 1 kV step

  • Voltage Monitor


    See data sheet

    Scale Factor

    1/100th of the measured voltage

    Output Current Limit

    ±10 mA

  • Front Panel Meter

    Voltage Display

    4-character, 7-segment LED display


    0 to ±3000 V


    1 V

  • Mechanical

    H x W x D

    108 x 223 x 430 mm (4.25 x 8.75 x 17 in)


    5 kg (11 lb)

  • Electrical

    Line Voltage

    Factory set for one of two ranges: 
    90 to 127 VAC or 180 to 250 VAC, at 48-63 Hz (specify when ordering)

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 370 Accessories

Global Support & Services

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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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