Trek offers a variety of probe types and sizes. More information is provided on select probe models at our Voltmeter Probes web site page which can be accessed via any of the linked models in the chart below. Once there, scroll down the page to find the probe of interest. For other probe models or additional assistance, please contact us. Also note that helpful information is provided just below the following chart.
Probe Selection Chart (PDF version)
| VOLTMETER | PROBE Model |
DIMENSIONS | BODY SHAPE/ APERTURE LOCATION |
SPECIAL FEATURE |
SPEED OF RESPONSE | NOISE (rms) |
| Model 320C 0 to ±100 V DC or peak AC |
3250 | 30.5 mm H 28.7 mm W 57.2 mm L |
square / side | high sensitivity |
less than 300 ms |
less than 3 mV |
| Model 325 0 to ±40 V DC or peak AC |
PD1216P | 10 mm dia. 56 mm L |
round / side | very high sensitivity |
less than 3 ms |
less than 1 mV |
* Model 323 Model 344 and Model 347 |
555P-1 | 5.6 mm sq. 49.8 mm L |
square / side | miniature | less than 3 ms |
less than 3 mV |
| 555P-4 | 5.6 mm sq. 49.8 mm L |
square / end | miniature | less than 4.5 ms |
less than 4 mV |
|
| 6000B-5C | 11.2 mm dia. 65.7 mm L |
round / end | high-resolution | less than 4.5 ms |
less than 4 mV |
|
| 6000B-6 | 10.3 mm dia. 69.7 mm L |
round / side | high-resolution | less than 3 ms |
less than 3 mV |
|
| 6000B-7C * | 11.2 mm dia. 65.7 mm L |
round / end | less than 4.5 ms |
less than 4 mV |
||
| 6000B-8 * | 9.5 mm dia. 68.6 mm L |
round / side | less than 3 ms |
less than 3 mV |
||
| 6000B-13C | 10.2 mm sq. 63.7 mm L |
square / end | high-resolution | less than 4.5 ms |
less than 3 mV |
|
| 6000B-14 | 10.2 mm sq. 68.7 mm L |
square / side | high-resolution | less than 3 ms |
less than 3 mV |
|
| 6000B-15C* | 10.2 mm sq. 63.7 mm L |
square / end | less than 4.5 ms |
less than 4.5 mV |
||
| 6000B-16 * | 10.2 mm sq. 68.6 mm L |
square / side | less than 3 ms |
less than 3 mV |
||
| 6300-7* | 11.8 mm H 11.1 mm W 76.2 mm L |
square / end | high temperature (to 100º C) |
less than 4.5 ms | less than 10 mV |
|
| 6300-8* | 11.8 mm H 11.1 mm W 76.2 mm L |
square / side | high temperature (to 100º C) |
less than 3 ms |
less than 3 mV |
|
| Model 341B 0 to ±20 kV DC or peak AC |
3450 | 11.8 mm H 11.1 mm W 76.0 mm L |
square / side | less than 200 µs |
less than 20 mV |
|
| 3453ST (similar style to 3450) | 11.8 mm H 11.1 mm W 76.2 mm L |
square / side | high temperature (to 100º C) |
less than 200 µs |
less than 20 mV |
|
| 3455ET (similar style to 3450) | 11.8 mm H 11.1 mm W 76.2 mm L |
square / end | high temperature (to 100º C) |
less than 200 µs |
less than 20 mV |
|
| Model 368A 0 to ±2 kV DC or peak AC and Model 370 |
3800E-2 | 5.6 mm sq. 50 mm L |
square / end | miniature | Model 368A is less than 200 us Model 370 is less than 50 us |
Model 368A is less than Model 370 is less than |
| 3800S-2 | 5.6 mm sq. 50 mm L |
square / side | miniature | |||
| 3870ET-2 | 5.6 mm H 5.6 mm W 50.0 mm L |
square / end | high speed |
|||
| 3870ST-2 | 5.6 mm H 5.6 mm W 50.0 mm L |
square / side | high speed |
|||
| Model 370 0 to ±3 kV DC or peak AC |
7000ER | 8.7 mm sq. 69.8 mm L |
round / end | 50 us | less than 20 mV |
|
| Model 370TR 0 to ±3 kV DC or peak AC |
3627 | 11.8 mm sq. 72.2 mm L |
square / side | less than 200 us |
less than 20 mV |
|
| 3629A | 11.8 mm sq. 72.2 mm L |
square / side | nonfringing transparent | less than 200 us |
less than 20 mV |
Aperture Size
The various aperture sizes available permit selection of spatial resolution and noise performance. Smaller aperture sizes provide finer spatial resolution. Larger aperture sizes provide lower noise.
End View/Side View
Trek probes are available with end-viewing or side-viewing detectors to accommodate the constraints of an installation.
Round and Square Bodied Probes
Selected Trek probes are available in round-body and square-body styles to accommodate different mounting requirements.
High Temperature
Probes are available with enhanced operating ranges for high temperature applications.
High Resolution
Probes are available with high resolution for critical measurements.
Transparent Probes
Transparent probes are used in applications where light must pass through the probe, such as photoconductor testing. This allows illumination and measurement of the same spot on the surface. The housing and sensitive electrode of the probe are made of a special optically transparent, electrically-conductive glass.
Special Purpose Probes
Trek application engineers can help solve many problems with custom designs and innovative solutions. Please contact TREK, INC. for more information.
Many voltage measurement applications cannot be made using conventional contacting voltmeters because they require charge transfer to the voltmeter, thus causing loading and modification of the source voltage. For example, when measuring voltage distribution on a dielectric surface, any measurement technique that requires charge transfer, no matter how small, will modify or destroy the actual data. In these types of applications a new approach to voltage measurement is needed.
An instrument that measures voltage without charge transfer is called an electrostatic voltmeter. A primary characteristic of an electrostatic voltmeter is that it accurately measures surface potential (voltage) on any kind of material without physical contact and therefore, no charge transfer and loading of the voltage source can occur.
In practice, an electrostatic probe is placed close (1 mm to 5 mm) to the surface to be measured. The electrostatic voltmeter functions to drive the potential of the probe body to the same potential as the measured unknown. This achieves a high accuracy measurement that is virtually insensitive to variations in probe-to-surface distances, as well as preventing arc-over between the probe and measured surface.
To Electrostatic Voltmeter Page...
Scientific, industrial, or research applications for Trek electrostatic voltmeter systems include:
Trek offers a wide variety of probes for use with the company's electrostatic voltmeters. If you are not sure which probe to use in your application please contact us for technical assistance. Email: custserv@trekinc.com )