Cryogenic Hall Sensors

Our graphene based magnetic field sensors are the first and only Hall effect sensors capable of measuring high magnetic fields at cryogenic temperatures. Particle accelerators, fusion reactors, and MRI systems are all benefiting from them today.

Paragraf is enhancing its customers’ ability to conduct magnetic field measurement in low-temperature and high-field environments.

Until now, conventional Hall sensors have been limited by material capabilities and a phenomenon known as the Quantum Hall Effect (QHE). With our unique graphene deposition process, Paragraf is averting these limitations by producing a cryogenic Graphene Hall Sensor (GHS) which has achieved operation down to millikelvin temperatures and fields measurements of over 30 Tesla

Graphene and robustness

Conventional Hall effect sensors can experience thermal expansion and contraction of their components when moving between varying temperatures, leading to the degradation of materials and failure of the sensing function.

Owing to its two-dimensional structure, graphene is an exceptionally flexible and robust material, capable of withstanding extreme temperatures and temperature shocks. Paragraf’s cryogenic GHS makes use of that flexibility, while enhancing the overall material strength of the sensor, by handling the entire construction process in our own facility. Using our patented technique, we incorporate the graphene layer into the sensor in a structurally-sound and impurity-free manner. This produces a sensor with a superior, highly durable construction.

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Why use Graphene?

Applications

Magnetic field monitoring for quantum computing
Electromagnet R&D and manufacture
Accurate magnet calibration at cryogenic temperatures
Magnetic field monitoring during cryogenic experiments
Rigid and thermally stable carbon fibre sample rod
Magnetic shielding attenuation factor determination – use the same sensor for field measurement on the inside and outside of the shield for characterisation