The problem
The FluxRite Belt Demagnetisation System is essential for maintaining the accuracy of tramp metal detectors on steel cord conveyor belts. Magnetism from tramp metal magnets, belt scanning systems and electrical currents builds up in the steel cords and concentrates at the splices. This residual magnetism reduces the effectiveness of the tramp metal detector, causing false alarms, or missed detections once operators lower the sensitivity to stop the false trips.
How FluxRite works
A three-frame assembly carries conditioning heads fitted with permanent rare earth magnets, positioned beneath the carry side of the belt. As the magnetised splices pass over the heads, rapid polarity reversals and the increasing distance between the head and the belt neutralise the residual magnetic field in the cords and splices. There is no power supply, no controller and nothing to calibrate after the initial installation and commissioning.
Common questions
Does it work with any tramp metal detector? Yes. It conditions the belt, not the detector, so it improves any downstream detector, TripTronic or otherwise.
Does the effect wear off? The heads are permanent magnets and the belt is re-conditioned on every pass. Flux is re-measured during service visits.
What is a belt demagnetisation system? A belt demagnetisation system (demag system, belt demagnetiser or demagnetizer) removes the residual magnetism that builds up in the steel cords of a conveyor belt. FluxRite mkII does it with permanent rare-earth conditioning heads mounted under the carry side, so the belt arrives at the tramp metal detector demagnetised.
What causes belt magnetism? Steel-cord belts pick up magnetism from tramp magnets, magnetic belt scanners, welding and stray electrical currents. It concentrates at the splices, where the cords are overlapped, and each magnetised splice looks like metal to a detector. Belt magnetism is measured in milligauss (mG) at the splice with a gaussmeter.
How do I know if belt magnetism is causing my false trips? If the detector trips at the same belt positions every revolution, and the interval matches the splice spacing, the splices are magnetised. Send us the belt type, splice count and detector model and we will confirm it.
