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A "self-demagnetizing suction disk" likely refers to an electromagnetic suction cup that can be turned off to release a held object, or perhaps a magnetic separator with an internal mechanism to release trapped ferrous material, but it's not a standard term; it combines electromagnets (for suction/holding) with demagnetization (to release), often seen in industrial settings for lifting or sorting, using an alternating current to neutralize magnetism when power is cut or reversed.

How it Works (General Concept):

Suction/Holding (Magnetization): When energized (usually with DC), the electromagnet creates a strong magnetic field, allowing it to hold ferromagnetic (iron-containing) objects, acting like a powerful suction cup.
Demagnetization (Release): To release the object, the magnetic field needs to be neutralized. This can happen by:
- Turning off the DC current, which stops the holding field but might leave residual magnetism.
- Applying an AC field (Degaussing): Passing the object through an alternating magnetic field (often using an AC electromagnet or a dedicated demagnetizer) disrupts the magnetic domains, effectively demagnetizing it.
- Internal Mechanisms: Some industrial separators use rotating magnets or shields to automatically release contaminants when the material flow stops or a cycle completes, acting as a "self-cleaning" or self-releasing function.

Self-cleaning pipeline magnetic separators MSP-AC - SOLLAU s.r.o.
The MSP-AC SHARK is a self-cleaning magnetic filter for pipeline transport. It's designed to handle heavy contamination at inconve...
www.sollau.com
High Quality Demagnetized Electromagnet DC 12V/24V ...
High Quality Demagnetized Electromagnet DC 12V/24V Energized Demagnetized Electromagnet Self Holding Circular Electric Suction ...
AliExpress
Surface Type Demagnetizers - Industrial Magnetics, Inc.
Benefits * Integrated Side Handle for hand held operation. * On/Off Switch. * Portable and Stationary models. * Continuous Duty. *
Industrial Magnetics, Inc.

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Self-demagnetizing Suction Disk Manufacturer, China Self ...

jgrail.com

https://www.jgrail.com › self-demagnetizing-suction-disk

jgrail.com

https://www.jgrail.com › self-demagnetizing-suction-disk

The patented self-demagnetization technology ensures zero residual magnetic field release, eliminating the risk of magnetic interference to signal equipment.

DC12V Suction 2KG Cup Electromagnet Power On ...

Amazon.com

https://www.amazon.com › Electromagnet-Demagnetiza...

Amazon.com

https://www.amazon.com › Electromagnet-Demagnetiza...

Power on demagnetization/power off demagnetization; Suction force: 2KG; Installation screw aperture: M4; Installation screw hole depth: 20mm ...Read more

High Quality Demagnetized Electromagnet DC 12V/24V ...

AliExpress

https://www.aliexpress.com › item

AliExpress

https://www.aliexpress.com › item

The product works, but the demagnetizing force is weaker than expected for my application. Build quality is decent, and the wiring is correct.Read more

Missing: ~~disk~~ ‎| Show results with: disk

Maurer Magnetic HE Hand-Held Demagnetizers

NDT Supply

https://ndtsupply.com › ... › Standard Demagnetizers

NDT Supply

https://ndtsupply.com › ... › Standard Demagnetizers

This powerful, hand-operated demagnetizer removes residual magnetism up to a depth of ~15 mm. To demagnetize successfully, the HE must be guided evenly across ...Read more

Industrial Powerful Suction Cup Demagnetizing and ...

eBay

https://www.ebay.com › itm

eBay

https://www.ebay.com › itm

Industrial Powerful Suction Cup Demagnetizing and Demagnetizing Machine HD-200 ; Quantity. 8 available ; Item number. 205605639126 ; Brand. Unbranded ; Type.Read more

$376.99 to $1,380.99In stock$331 delivery

Missing: ~~Self-~~ ‎~~disk~~

Demagnetizers - SOLLAU | Magnetic separation

sollau.com

https://www.sollau.com › demagnetizers

sollau.com

https://www.sollau.com › demagnetizers

Demagnetizers are devices designed for removing magnetic properties from various parts, tools, drills etc.Read more

Magnetic Separators

911Metallurgist

https://www.911metallurgist.com › equipments › magn...

911Metallurgist

https://www.911metallurgist.com › equipments › magn...

The following sections present an overview of the most widely used permanent magnetic separators: rare-earth drum and rare-earth roll-type separators.Read more

11255 - Demagnetizer - General Laboratory Supplies

Ladd Research

https://www.laddresearch.com › demagnetizer

Ladd Research

https://www.laddresearch.com › demagnetizer

Demagnetizes or magnetizes parts or tools. To demagnetize: simply hold object in the center of the opening with button depressed for 3 or 4 seconds.

$104.95In stock

Handheld demagnetizers

Goudsmit Magnetics

https://www.goudsmitmagnetics.com › en-us › products

Goudsmit Magnetics

https://www.goudsmitmagnetics.com › en-us › products

With portable demagnetizers, you can easily demagnetize tools and machine parts in hard-to-reach places. Order them here.

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Dexter Magnetic Technologies

https://www.dextermag.com › ... › Magnetic Assemblies