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Magnet accessories for science experimentation, magnetic properties, quality control & more.
Genuine UK made Magnaprobes™ for magnetic pole or magnetic leak detection.
A Magnaprobe™ can show the true three-dimensional nature of a magnetic field better than either a plotting compass or iron filings. Use it for lab demonstrations or field work.It consists of a small AlNiCo bar magnet held in place by a gimbal mount on a sturdy plastic support wand.
The Mark I Magnaprobe™ uses ultra-low friction jewel mounts for exceptional sensitivity to static magnetic field strengths as low as 0.3 gauss (3 microtesla). Use it to detect very weak magnetic leaks or the effectiveness of magnetic shielding. Some people have used it to demonstrate terrestrial magnetism including magnetic inclination & declination.
The basic Mark II model is a must for high school physics or electronics classes who want to see the variation in magnetic field shape in the X-Y-Z planes. It is also a very handy tool for aligning magnets. The Magnaprobe's alnico bar magnet has N & S red-blue painted poles so you can use it to line up all your magnets so that their poles face the same way; a great Q/A timesaver. You can even use it to probe Eddy Currents as used in amusement park roller coaster & drop tower magnetic brakes.
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Magnaprobe™ is a trademark of Cochranes of Oxford, UK. If you see a similar black, red or green handled version selling for <$10, it is a cheap knockoff from "you know where"-caveat emptor.
| Engineering Metric | Ultra-Sensitive Mark I (White Frame) | Standard Mark II (Black Frame) |
|---|---|---|
| Primary Intent | Boundary leak mapping & custom shielding attenuation testing. | Macro-field tracking, polarity checking & lab education. |
| Minimum Sensitivity | 0.3 Gauss (30 µT / 0.03 mT) | ~3.0 Gauss (300 µT / 0.30 mT) |
| Mu-Metal Validation | Excellent. Easily tracks micro-flux leakage past stressed weld lines. | Not Recommended. Insufficient sensitivity for weak leakage path thresholds. |
| Beamline Utility | Isolating micro-Tesla drift zones near sensitive diagnostics. | Verifying macro-polarities on quadrupoles/skew dipoles post-excitation. |
| Geomagnetic Response | Active. Tracks ambient global variations (dip/tilt mapping). | Stable. Ignores low ambient room-scale geomagnetic noise. |
