Sigint Solutions


C.A 41 Field Intensity Meter

ca41 field intensity meter
The C.A 41 field intensity meter offers an efficient solution to Electromagnetic Compatibility (EMC) test measurements, as it can be used to determine the emissivity of radiant equipment or to measure an ambient field in a sensitive environment.

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 Pollution of the radio-electric environment is becoming more and more severe, leading to malfunction problems in many types of electrical equipment, especially since the use of sequential logic and the development of microprocessors.
These modern techniques are used in practically all types of industrial equipment which makes them particularly sensitive to interference and electromagnetic disturbances. The C.A 41 field intensity meter allows the user to measure these levels of disturbance.

Measurements are of two types :

Measurement of atmosphere (susceptibility): This measurement indicates the value of the electromagnetic field in which equipment is located, in order to check that this field does not exceed the permitted limits inaccordance with standards 801-3 and IEC 1000-4-3 or similar.

Measurement of emissivity (radiation): This measurement indicates the value of the electromagnetic field emitted by equipment which is switched ON, and consequently its class of electromagnetic compatibility in accordance with the applicable standard.
The C.A 41 is a small portable instrument that measures the electric field present in the atmosphere surrounding its measurement probe.
This probe consists of an aerial combined with a high frequency detector. The wide passband of this unit enables the measurement of electrical fields from 0.1 V/m to 200 V/m and for the frequency range of 100 kHz to 2.5 GHz. The connection between the measurement probe and the base instrument is made via a socket which allows the safe removal of the measurement probe during transportation. The use of microprocessors for measurement, calculations and management of the display makes the instrument simple to use and very accurate. The large dimensions of the LCD comprise a 2000 count digital display, a logarithmic 40-segment bargraph and a display of the different measurement symbols that provide easy reading for the user. An analogue output allows the measurement to be controlled at a distance for recording on a plotter or an analogue recorder with a minimum impedance of 100 kW.


Technical Specifications

  • Frequency Range: 100kHz to 2.5GHz
  • Electric field Range: 0.1 to 200V/m
  • Power density: 0.1 to 2mW/cm2
  • 1ms peak measurement
  • Configurable alarm threshold
  • EF1 polarisation probe as standard
  • Analogue output
  • Dimensions: 216 x 72 x 37mm - weight: 350g


EF2A isotropic probe
9V Battery\Shockproof holster