Creating a Degausser to Reduce Magnetic Field Strength

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SUMMARY

The discussion centers on creating a degausser to reduce the magnetic field strength of a stamped steel component, which measures up to 2000mGa, interfering with a sensitive magnetic sensor. Users suggest utilizing a solenoid with alternating current (AC) to decrease magnetization gradually. Alternatives include borrowing a degausser from an old-fashioned TV repair shop or contacting a data security business for access to larger degaussers designed for bulk magnetic media erasure. The feasibility of annealing the steel or using mu metal is dismissed due to the component's constraints.

PREREQUISITES
  • Understanding of magnetic fields and their measurement
  • Knowledge of solenoid operation and AC current application
  • Familiarity with degaussing techniques and equipment
  • Basic principles of magnetic material properties
NEXT STEPS
  • Research the design and operation of solenoids for degaussing applications
  • Learn about the principles of AC current and its effects on magnetization
  • Investigate commercial degaussing equipment and their specifications
  • Explore the properties and applications of mu metal in magnetic shielding
USEFUL FOR

Engineers, technicians, and hobbyists involved in magnetic field management, particularly those working with sensitive sensors and magnetic materials.

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I have a component made of some sort of stamped steel which has a significant magnetic field (upto 2000mGa) which I need to use near a sensitive magnetic sensor. The field is high enough to saturate the sensor so I can't calibrate it out.

Does anyone have any idea about degaussing?
I tried a tape eraser we had but it didn't do anything.
I thought of making one, by wrapping a coil around the part - but I have no idea of what kind of field strength or frequency to use.
 
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I guess getting the steel annealed and/or wrapping it in a mu metal is out of the question?

Zz.
 
ZapperZ said:
I guess getting the steel annealed and/or wrapping it in a mu metal is out of the question?
Yes, unfortunately it's part of a component that we can't change.
 
Put it in a solenoid with AC current. Then slowly decreasing the current should decrease the magnetization.
 
Go to an old-fashioned TV repair shop and borrow a degausser, or contact a data security business. They may have large degaussers suitable for bulk erasure of magnetic media.
 

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