Skip to content

Trek 341B Series


High Speed, High Voltage, Electrostatic Voltmeter

The high-speed Trek® 341B electrostatic voltmeter does not require fixed spacing to maintain DC-stability and high accuracy. It utilizes a field-nulling technique that allows you to measure stationary or moving surfaces. The Trek® 341B also uses a patented probe design that eliminates the need for close-tolerance components. This design significantly improves noise and drift in high humidity and wide temperature ranges.


  • Precision voltage monitor output
  • Use low voltage replica of the measured electrostatic potential for monitoring purposes or  as a feedback signal in a closed loop system
  • Easy-to-read LED display
  • Optional probes offer versatility (order separately)
  • Operate via benchtop, or with optional hardware, in a standard 19-inch rack
  • NIST-traceable Certificate of Calibration provided with each unit


  • Measure stationary or moving surfaces
  • Eliminate the need for fixed spacing
  • Benefit from patented probe design that eliminates the need for close tolerance components 
  • Achieve DC stability and high accuracy with field nulling technique
  • Improve noise and drift performance


Operational temperature range (°C): 0 to 40
Measurement Range: 0 to ±20000 V
Measurement Accuracy (%): ±0.1%
Speed of Response (ms): <0.2, <5


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.

Technical Documentation


Calibration and Alignment

Advanced Energy has the tools and processes to ensure your equipment continues to meet its original specifications.  Our products are calibrated at global AE service sites with proprietary technology designed to exceed industry standards​.

Agreement Term Options

24/5 Support Available

Get Expert Advice From Our Engineers

We are committed to providing excellent customer service and technical support to our customers. With live chat and phone support, you can reach out to a qualified engineer for help at any time.
Get Support Now