where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

TecScan Systems
We offer a complete line of NDT scanners, Immersion Tanks & Gantry systems which incorporate Ultrasonic, Phased Array & Eddy Current technologies.

1529 views
Technical Discussions
Elmar van den Elzen
Engineering,
Lismar Engineering B.V., Netherlands, Joined Aug 2000, 15

Elmar van den Elzen

Engineering,
Lismar Engineering B.V.,
Netherlands,
Joined Aug 2000
15
01:06 Apr-11-2006
measuring conductivity and permeability

Dear all,

We want to measure the electrical conductivity and the effective magnetic permeability of ferromagnatic samples. The samples typically have a flat site a few cm across. Does anyone know a lab that could do these measurements or know a straight forward method we can set-up ourselves?

Best regards


    
 
 
Linas Svilainis
R & D,
Kaunas University of Technology, Lithuania, Joined Nov 1998, 67

Linas Svilainis

R & D,
Kaunas University of Technology,
Lithuania,
Joined Nov 1998
67
02:25 Apr-11-2006
Re: measuring conductivity and permeability
Dear Elmar,

you wrote
----------- Start Original Message -----------
: ..We want to measure the electrical conductivity and the effective magnetic permeability of ferromagnatic samples...

Maybe it's a complex permeability you want to measure?
If yes:

.. Does anyone know a lab that could do these measurements or know a straight forward method we can set-up ourselves?...

Then RLC meter with some mathematics on geometry will do. We have prepared the paper on toroidal samples complex permeability measurement in low frequency range (0.1-10MHz). If interested, I can send you some excerpts.

People do complex permeability measurement at GHz. For instance, refer to:
Jacquart. Influence of the electrical resistivity of a ferromagnetic thin film on its permeability measurement performed with a permeameter. Elsevier Journal of Magnetism and Magnetic Materials 281 (2004) 82–91

Best regards

Linas


    
 
 
Changqing Lee
Changqing Lee
03:37 Apr-11-2006
Re: measuring conductivity and permeability
I have seen people use alternative current potential drop (ACPD) method for measuring the electrical conductivity and the effective magnetic permeability of ferromagnatic samples at the frequency range of several hundred Hz to 10KHz. Please google it yourself.

Eddy current testing is another option. But to determine conductivity and permeability at the same time is always hard.

----------- Start Original Message -----------
: Dear Elmar,
: you wrote
: : ..We want to measure the electrical conductivity and the effective magnetic permeability of ferromagnatic samples...
: Maybe it's a complex permeability you want to measure?
: If yes:
: .. Does anyone know a lab that could do these measurements or know a straight forward method we can set-up ourselves?...
: Then RLC meter with some mathematics on geometry will do. We have prepared the paper on toroidal samples complex permeability measurement in low frequency range (0.1-10MHz). If interested, I can send you some excerpts.
: People do complex permeability measurement at GHz. For instance, refer to:
: Jacquart. Influence of the electrical resistivity of a ferromagnetic thin film on its permeability measurement performed with a permeameter. Elsevier Journal of Magnetism and Magnetic Materials 281 (2004) 82–91
: Best regards
: Linas
------------ End Original Message ------------




    
 
 
Jim Yukes
Consultant
Canada, Joined Aug 2005, 11

Jim Yukes

Consultant
Canada,
Joined Aug 2005
11
08:15 Apr-13-2006
Re: measuring conductivity and permeability
I checked with a Queens U Magnetics Department Grad & he suggested: There are many different ways to measure permeability depending on the material and application. For some standard methods visit www.astm.org and search for standards with key words "magnetic permeability".

For the conductivity measurement, Google search phrase "contact resistance tester".

----------- Start Original Message -----------
: Dear all,
: We want to measure the electrical conductivity and the effective magnetic permeability of ferromagnatic samples. The samples typically have a flat site a few cm across. Does anyone know a lab that could do these measurements or know a straight forward method we can set-up ourselves?
: Best regards
------------ End Original Message ------------




    
 
 

Product Spotlight

High Resolution Industrial CT System for Small/Medium Size Parts Inspection

The YXLON FF35 CT computed tomography system is designed to achieve extremely precise inspection res
...
ults for a wide range of applications. Available in a single or dual tube configuration, it is perfect for very small to medium size parts inspection in the automotive, electronics, aviation, and material science industries.
>

NEW - TD Focus-ScanRX

The NEW Next Generation Advanced UT platform, TD Focus ScanRX - Also available as a card stack solut
...
ion. Key Improvements 1. Data acquisition is significantly faster than current design 2. Better aesthetic – closely aligns with HandyScan RX 3. Improved IP rating (Target IP66) 4. Ruggedized housing 5. Connectors are protected from impact and ingress 6. Integrated stand and separate retractable handle easy to keep clean) 7. Touchscreen with ruggedized display glass 8. 3-Axis encoder input
>

Ultrasonic tomograph for imaging of concrete structures А1040 MIRA

Applicable for concrete inspection allowing imaging of the internal structure of objects from conc
...
rete, reinforced concrete, different stones. The operation applies pulse-echo technique at one-side access to the object. The instrument is feasible for concrete inspection for searching conduct ducts, conduits, detection of foreign inclusions, holes, honeycombing, cracks and other concrete defects.
>

Research Center IDEKO develops an ultrasonic train wheel inspection system for CAF

The Basque Research centre IK4-IDEKO has developed a state-of-the-art ultrasonic inspection system f
...
or the train wheel. This system secures a sound condition of train wheels and is thus a significant contribution to rail transport safety. The device was delivered to CAF recently and its use allows the manufacturer to become an approved supplier of rolling stock in Italy, as it meets the demanding homologation standards of this country. \\\\r\\\\n
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window