Magnetic Field (B-dot) Sensors

The Prodyn magnetic field B-dot sensors are small to medium-sized high frequency sensors that measure the rate of change over time in magnetic fields.

They are available in free-field, surface type and radiation hardened formats with sensitive areas of up to 0.1 m2 or upper 3 dB points of 11 GHz. The voltage output from the probe is proportional to the rate of change of the incident magnetic field.

The products come with a 1 year warranty included.

How does a B-dot probe work?

B-dot sensors 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 50 Ω.

Output processing

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