Trek Product Line
Non-Contacting Voltmeter Probes

We offer various probe options for our non-contacting Trek voltmeters. Explore common terms and uses, find the right probe for your application, and view commonly asked questions.

Probe Selection Charts

  • Trek 320, 323, and 325
    Voltmeter Probe Model Dimensions Shape/ Aperture Location/Size Special Feature Response Speed
    (less than)
    Noise (rms)
    (less than)

    Trek 320

    3250 30.5 mm H
    28.7 mm W
    57.2 mm L
    Square / side
    6.35 mm dia.
    High-sensitivity

    300 ms

    5 mV
    (1:1 ratio)

    Trek 323


     

    6000B-8 9.5 mm dia.
    68.6 mm L
    Round / side
    1.32 mm dia.
     

    3 ms

    2 mV

    6000B-16 10.2 mm sq.
    68.6 mm L
    Square / side
    1.32 mm dia.
     

    3 ms

    3 mV

    Trek 325

    PD1216P 10 mm dia.
    56 mm L
    Round / side
    4.6 mm dia.
    High-sensitivity

    3 ms

    1 mV
    (1:1 ratio)

  • Trek 341B and P0865
    Voltmeter Probe Model Dimensions Shape/ Aperture Location/Size Special Feature Response Speed
    (less than)
    Noise (rms)(less than)

    Trek 341
    Trek P0865


     

     

    3450 11.8 mm H
    11.1 mm W
    76.0 mm L
    Square / side
    3.05 mm X 1.52 mm
     

    200 μs

    20 mV

    3453ST 11.8 mm H
    11.1 mm W
    76.2 mm L
    Square / side
    3.05 mm X 1.52 mm
    High-temperature
    (to 100°C)
    High-vacuum

    200 μs

    20 mV

    3455ET 11.8 mm H
    11.1 mm W
    76.2 mm L
    Square / end
    1.59 mm dia.
    High-temperature
    (to 100°C)
    High-vacuum

    200 μs

    20 mV

  • Trek 344 and 347
    Voltmeter Probe Model Dimensions Shape/ Aperture Location/Size Special Feature Response Speed
    (less than)
    Noise (rms)(less than)

    Trek 344
    Trek 347

    555P-1 5.6 mm sq.
    49.8 mm L
    Square / side
    2.56 mm dia.
    Miniature

    3 ms

    3 mV

    555P-4 5.6 mm sq.
    49.8 mm L
    Square / end
    1.17 mm dia.
    Miniature

    4.5 ms

    4 mV

    6000B-5C 11.2 mm dia.
    65.7 mm L
    Round / end
    0.79 mm dia.
    High-resolution

    4.5 ms

    4 mV

    6000B-6 10.3 mm dia.
    69.7 mm L
    Round / side
    0.79 mm dia.
    High-resolution

    3 ms

    3 mV

    6000B-7C 11.2 mm dia.
    65.7 mm L
    Round / end
    1.32 mm dia.
     

    4.5 ms

    4 mV

    6000B-8 9.5 mm dia.
    68.6 mm L
    Round / side
    1.32 mm dia.
     

    3 ms

    2 mV

    6000B-13C 10.2 mm sq.
    63.7 mm L
    Square / end
    0.79 mm dia.
    High-resolution

    4.5 ms

    4 mV

    6000B-14 10.2 mm sq.
    68.6 mm L
    Square / side
    0.79 mm dia.
    High-resolution

    3 ms

    3 mV

    6000B-15C 10.2 mm sq.
    63.7 mm L
    Square / end
    1.32 mm dia.
     

    4.5 ms

    ms 4 mV

    6000B-16 10.2 mm sq.
    68.6 mm L
    Square / side
    1.32 mm dia.
     

    3 ms

    3 mV

    6300-7 11.8 mm H
    11.1 mm W
    76.2 mm L
    Square / end
    1.32 mm dia.
    High-temperature
    (to 100°C)

    6 ms

    10 mV

    6300-8 11.8 mm H
    11.1 mm W
    76.2 mm L
    Square / side
    1.32 mm dia.
    High-temperature
    (to 100°C)

    4 ms

    10 mV

  • Trek 370
    Voltmeter Probe Model Dimensions Shape/ Aperture Location/Size Special Feature Response Speed
    (less than)
    Noise (rms)(less than)

    Trek 370


     

     

     

     

    3800E-2 5.6 mm sq.
    50 mm L
    Square / end
    1.85 mm dia.
    Miniature

    50 μs

    20 mV

    3800S-2 5.6 mm sq.
    50 mm L
    Square / side
    2.35 mm dia.
    Miniature

    50 μs

    20 mV

    3870ET-2 5.6 mm sq.
    50 mm L
    Square / end
    1.85 mm dia.
    Elevated temperature
    (to 60°C)

    50 μs

    20 mV

    3870ST-2 5.6 mm sq.
    50 mm L
    Square / side
    2.35 mm dia.
    Elevated temperature
    (to 60°C)

    50 μs

    20 mV

    7000ER 8.7 mm dia.
    69.8 mm L
    Round / end
    1.60 mm dia.
     

    50 μs

    20 mV

Probes: What to Consider

Aperture Size

Choose from various aperture sizes based on your spatial resolution and noise performance requirements. Smaller aperture sizes provide finer spatial resolution. Larger aperture sizes provide lower noise.

End View and Side View

Select from end-viewing or side-viewing detectors to accommodate installation constraints.

Shape

Meet different mounting requirements by selecting a round or square probe body style.

High Temperature

Choose a probe with enhanced operating temperature ranges (up to 100° C) for your high-temperature applications. 

High Resolution

Use our high-resolution probes for critical measurements and to resolve extremely small spot diameters. 

 

Transparency

Select a transparent probe for applications where light must pass through the probe (e.g. photoconductor testing). This allows you to illuminate and measure the same surface spot. The transparent probe housing and sensitive electrode are made of a special optically transparent, electrically-conductive glass.

Patented Design

The patented design of our Trek probes provides the largest possible signal strength to reduce noise and drift and to maintain optimum performance at wider probe-to-surface distances. In Trek probes, the electrode is located on a vibrating reed. This places the electrode in motion, in the aperture, close to the surface for maximum signal strength. 

Customization

Please contact us to discuss custom probe options for unique requirements and applications.  

Probe FAQs

  • Can you clean AE's Trek probes ?

    Yes. To clean our probes:

    1. Turn off your AE Trek electrostatic voltmeter and disconnect the probe.
    2. Pour a generous amount of isopropyl alcohol into the aperture of the probe and shake to dislodge any contaminants.
    3. Turn the probe so the aperture faces down and pour out the alcohol.
    4. Gently shake the probe to remove excess alcohol and allow it to dry (at least 15 minutes) before placing the probe back into service.
  • What is the difference between side view and end view probes?

    On the side view probe, the sensor aperture is on the side of the probe thereby requiring the probe body to be parallel with the measured surface. On the end view probe, the sensor aperture is on the end of the probe, requiring the probe body to be perpendicular with the surface being measured. Choose which option best meets your application area.

  • In relation to non-contacting electrostatic voltmeter (ESVM) probes, what does the term “spot surface resolution” mean?

    Spot surface resolution is the diameter of a spot on the surface that is being measured by the non-contacting ESVM probe. The diameter of the spot area being measured is largely influenced by the spacing between the probe and the surface being measured, as well as the probe’s aperture size.

    As a general rule of thumb for AE's Trek electrostatic voltmeters, the ratio is 5:1.  For example, using a standard Trek probe spaced at a distance of 2 mm from the surface, the surface area being measured is a surface spot diameter of approximately 10 mm. If the probe-to-surface spacing is 3 mm, the surface area diameter spot being measured is approximately 15 mm. This ratio varies somewhat between different models. Specific information for different probe models is available.

  • What types of materials are recommended for fixturing probes ?

    We recommend a charge non-retaining insulator such as phenolic or Bakelite® (resistance range 108 to 1011).

  • What are some examples of probe fixtures?

    Our Trek square body probes are available with an end view or side view sensor. Here are two diagrams showing how to fixture the probes.

    probe-diagram.jpg

Thank You

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Thank You

You may now view any resource on the Advanced Energy site. Click the button below to view your requested resource.