Magmeter MF300B+ Magnetic Flux Meter
Handheld fluxmeter with rugged probe
The Diverse MF300B+ hand held, battery operated Magnetic Flux Meter with its rugged stainless steel probe is suitable for laboratory and workshop use.
The meter is microprocessor controlled and uses a membrane key pad and a digital display which makes it simple to operate. The MF300B+, is a novel search coil based instrument that steals flux from the ferrous material under test (MUT) to assess the level of magnetic flux inside the MUT. By integrating the change in magnetic flux lines between a position in air and on the surface of the MUT the flux in the material can be estimated. There are a wide range of applications for the instrument but it has found important use in NDT, allowing material magnetization to be assessed for magnetic particle inspection (MPI).
The measurement is a two step process; firstly, with the probe away from the MUT the instrument is zeroed, then during the measurement phase the probe is brought in to the MUT and integration of the signal is completed over 10 seconds.
Magnetic inspection often calls for the use of a specified level of magnetic flux within steel components. If the magnetic flux level is too low, then defects may be overlooked: if too high then spurious indications may occur. The MF300B+ measures the magnetic flux density just below the surface.
The MF300B+ is tested using a steel ring calibrated by The National Physics Laboratory (NPL). Using the ring, the instrument is defined to be set up with fields in carbon steel. Providing the magnetic characteristic is similar to carbon steel the MF300B+ can be used with confidence.