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Vector E-Field Probes
Kapteos eoProbe Kapteos Logo  Made in France

Kapteos Triaxial Vector E-Field Probes (10Hz to 100GHz)

Comprehensive non-invasive electric field measurement system.

No metal content E-Field probe system.

The picture below presents the up to date available products and accessories.
The minimum required system to perform an electric field measurement is to have the eoProbe sensor connected to the optoelectronic converter called eoSense.

The System Components are as follows:

eoSense: opto-electronic converter (from 1 to 3 channels)

eoProbe: optic probe (1 probe measures 1 axis of an electric field)

eoSwitch: optical switch to select a probe among several ones

eolink: optical extension lead

eoCal: electric field applicator to calibrate a probe

eoPod: holder to maintain up to 3 probes

triaxial: optic probe (1 probe measures 3 axis of an electric field)

eoVac: removable feedthroughs for low and high pressure

Kapteos E-Field Vector Probe System 

Kapteos new triaxial vector electric field probe

How to measure the three components of the E-field vector within a small enclosure?

For that purpose, Kapteos introduces a breakthrough with a triaxial vector electric field probe. Such probe allows to measure sequentially the three E-field components while staying in same position and direction. To switch from Ex to Ey component, and then from Ey to Ez component, the probe simply needs to be rotated 120°


Triaxial E-Field Probe

View Animation

Main Features

  • Vector E-field: 3 axis + phases
  • Frequency bandwidth: 10Hz to 40GHz with sub-nanosecond temporal resolution
  • Now available up to 100GHz
  • Dynamic range: 50 mV/m to several MV/m
  • Max E-field: > 10MV/m without damage
  • Spatial resolution: < 1 mm
  • Multi media: air, liquids, gas, vacuum
  • Compactness: 5 * 35 mm sensing probe
  • Non-invasive: NO METAL => no impact on E-field
  • Selectivity: > 50 dB
  • Sensitivity: 50 mV/m/√Hz (94 dBµV/m)
  • Near field: down to 0 mm distance
  • Max B-field: withstand more than 4.7T
  • Operation temperature: 0 to 50°C (probe)
  • AF correction: automatic and real-time
  • Remote distance: up to 100 meters
  • Easy installation: set-up ready in < 5 min

  • Measure plasma plume and plasma jet
 Main features of Kapteos electro-optic technology for electric fields

eoSense converter to operate the full system

 

Front side view of eoSense instrument


Data		 This opto-electronic converter must be used with the eoProbe sensors, a dedicated Kapteos software or using dedicated instructions sent from your own software via the Ethernet port. It operates up to 3 eoProbe directly connected. It converts in real-time (100% analog conversion) the optical signal transmitted by the eoProbe into an electrical signal that can be analysed with an instrument like an oscilloscope, a spectrum analyser or any other signal processing instrument.
It includes an antenna factor (AF) real-time treatment for measuring absolute electric fields (modulus, phase).
Each eoSense is delivered with a Routine Test Report valid for 2 years.

5 opto-electronic converter versions to match your needs

Reference Bandwidth Internal Amplification
LF-30S 40 Hz to 30 MHz 30 dB (in standard)
MF-01U 1 kHz to 1 GHz 1 kHz to 1GHz
50 dB gain
HF-10 100 MHz to 10 GHz 100 MHz to 10GHz
55 dB gain
HF-20 100 MHz to 20 GHz 100 MHz to 20GHz
45 dB gain
HF-40 20 kHz to 40 GHz 100 MHz to 40GHz
48 dB gain

New
4th Gen. of Optoelectronic Converter eoSense

eoSense Version 4

Data

The 4th generation of Kapteos converters are easier than ever to use.

They present also great advantages with respect to previous generation:

  • Automatic probe recognition
  • Automatic AF setting at frequency of interest
  • Probe sensitivity axis orientation 2 times more accurate
  • Ruggedized optical connector (MIL-38999)
  • No more external computer
  • Extension down to 10 Hz for LF model (5 times lower)
  • Up to 3 RF sub-bands for SHF model
  • 1→10 GHz shielding effectiveness improved by 30 dB
  • Separate calibration of probes and converters
Direct control of AWG and ASA as a software option

eoProbe to measure the electric field

Electric field probe Transverse air with optical connector

 

Data

 It measures one component of the electric field vector based on the electro-optic technology. This Ultra-Wide Band sensor allows accurate measurements in almost any location and environment (air, liquids, gases, vacuum) under harsh conditions.
Each eoProbe is delivered with a Routine Test Report valid for 2 years.
This probe must be used with the eoSense converter.
6 patents covers the eoProbe: EP2035845, EP2035846, US7769250, US8264684, CA2655034, CA2655447.

12 EMF probe versions to match your needs

Reference

Environment

Sensitivity - Bandwidth

Type

ET5-air

Low permittivity (Air / oils)

250 mV/m - 30 Hz-10 GHz

Trans

ET1-air

Low permittivity (Air / oils)

500 mV/m - 30 Hz-50 GHz

Trans

EL5-air

Low permittivity (Air / oils)

50 mV/m - 30 Hz-10 GHz

Long

EL1-air

Low permittivity (Air / oils)

200 mV/m - 30 Hz-50 GHz

Long

ET5-vac

Low permittivity (vacuum)

250 mV/m - 30 Hz-10 GHz

Trans

ET1-vac

Low permittivity (vacuum)

500 mV/m - 30 Hz-50 GHz

Trans

EL5-vac

Low permittivity (vacuum)

50 mV/m - 30 Hz-10 GHz

Long

EL1-vac

Low permittivity (vacuum)

200 mV/m - 30 Hz-50 GHz

Long

ET5-bio

High permittivity
(water based liquids)

50 mV/m - 30 kHz-10 GHz

Trans

ET1-bio

High permittivity
(water based liquids)

200 mV/m - 30 kHz-50 GHz

Trans

EL5-bio

High permittivity
(water based liquids)

50 mV/m - 30 kHz-10 GHz

Long

EL1-bio

High permittivity
(water based liquids)

200 mV/m - 30 kHz-50 GHz

Long

Main Specifications

Characteristics Values
Sensitivity and bandwidth See above eoProbe versions table
Dynamic of measurement ≥ 130 dB.√Hz
Selectivity ≥ 50 dB
Spatial resolution ≤ 1 mm
Operating temperature 0°-50° C (32° - 122 ° F)
Operating pressure 0 - 2030 hPa (0 - 29.4 PSI)
Max E-field without damage 10 MV/m
Max B-field without damage 4.7 Tesla
Ingress protection rating IP 67 (sensor only)
Chemical compatibility of gases Air, nitrogen, plasmas, SF6
Chemical compatibility of liquids Water, oils, alcohols, biological liquids
Probe cleaning Clean lightly moistened with isotropilic alcohol
Fibre optic diameter 2.8 mm (see data sheet for vacuum)
Optic fibre minimum bend radius 40 mm (see data sheet for vacuum)

Accessories for the eoSense opto-electronic converters
eoLink fibre optic extension

Data

Fibre optic extension

The fibre optic extension is inserted between the eoSense converter and an eoProbe sensor to increase the distance up to a maximum of 100 meters. A rugged version for outdoor usage is available in standard.
eoPad version 2

X, Y, Z Orthogonal Plane Probe Holder

Kapteos_Three_eoProbe_Holder


Data

eoPod ver 2 for eoProbe sensors

This accessory allows via its articulated arm to maintain the probe  on a specific location. It is fully dielectric hence can be used near E-field sources. 2 versions are available: one for air and vacuum probes and one for bio probes.

 

Kapteos EoPod Video eoPod Holder

Kapteos EoPod Video Install eoProbe
Kapteos eoVac 

Data

eoVac for feedthroughs for low & high pressure

The removable feedthroughs eoVac allow to use any air-line or bio-line probe eoProbe under medium vacuum or up to a pressure of 2 atmospheres.
Kapteos eoCal

Data

eoCal for electric field probe calibration

For a very accurate measurement inside liquid medium or air, eoCal is an easy and fast calibration accessory of your electric field probes.

 

Electromagnetic Measurement Applications

Note Application Note:Compariston of different E-field measurement systems

Note Application Note:Antennas Pattern Characterization

Note Application Note:Measuring the Magnetic Fields required to produce Plasma

Note Application Note:Measuring the Magnetic Fields produced by an MRI Machine

Note Application Note:Measuring Low RMS signal from a MRI Machine

Note Application Note:Measurement of E-fields in Electro Magnetic Compatibility

Note Application Note: E-field Measurement System Basic Technology

Note Application Note:Specific Absorption Rate Assessment

Note Application Note:High voltage (insulation, partial discharges)

Note Application Note:Antennas Pattern Characterization

Note Application Note:Measuring the Magnetic Fields required to produce Plasma

Note Application Note:Measuring the Magnetic Fields produced by an MRI Machine

Note Application Note:Measuring Low RMS signal from a MRI Machine

Note Application Note:Measurement of E-fields in Electro Magnetic Compatibility

Kapteos Triaxial Vector Electric Field Probe Videos

Kapteos Reactive near field mapping of a horn antenna

Kapteos solution for the Real time SAR measurement in phantom

Vectorial E field measurement in cold plasma

E-field Measurement System using none invasive eoProbe

Extension of the Limited Warranty

Kapteos is proud to announce that the previous 1-year limited warranty on all our product lines is strongly increased since today, September 1st, 2026. Indeed, for all new orders, the limited warranty on all our product lines is now defined as follows:

  • 3 years on all optoelectronic converters eoSense™ 

  • 3 years on all probe holders eoPod™

  • 3 years on all EM-field applicators eoCal™

  • 3 years on all vacuum and high pressure feed-throughs eoVac™

  • 3 years on all optical multiplexers eoSwitch™

  • 2 years on all EM-field probes eoProbe™

  • 2 years on all OEM EM-field measurement systems eoField™

  • 2 years on all EM-field measurement scanners eoScan™

Free 4G Cleaner

With every order of an optoelectronic converter eoSense™, a 4G cleaner will be now systematically provided to ensure that you will able to clean the optical connectors in case of working in a slightly dusty environment.


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