Magnetic field (B-DOT) sensors

Inductive magnetic field probes, also known as B-dot probes, are used for measuring magnetic fields. PRODYN sensors are small to medium-sized high frequency sensors available in the following formats:

…with sensitive areas of up to 0.1m² or upper 3dB points of 11GHz.

How a B-dot probe works

B-dot probes generate an output voltage when immersed in a time-changing magnetic field. The operation is based on Faraday’s Law in which time-varying magnetic fields perpendicular to and linking the inductive coil windings induce a voltage proportional to the time derivative of the magnetic field. The voltage output from the probe is measured as voltage across a load impedance – typically 50Ω.

Output processing

The raw dB/ dt -generated probe signal can be time-integrated to provide a local measurement using an analog integrating circuit or recorded and integrated in post-processing.

Please contact PPM Test on 01793 784389 / for support with choosing the right sensor and how to interpret the results.

Product Information

The Magnetic field sensors support standards testing for EMC, EMP, HIRF, NEMP etc., including key standards such as:

  • MIL-STD-188-125
  • MIL-STD-461G
  • DEF STAN 59-188
  • DEF STAN 59-411.

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