The compact List-Magnetik FLUX-CHECK 250 is a new handheld fluxmeter designed for measuring the magnetic flux (Phi) of magnet systems and individual magnets. This innovative device offers a precise method for testing ferromagnetic materials, making it ideal for material analysis and testing in a variety of applications.
When assessing a permanent magnet or magnetic system, the quality and strength of its magnetization are critical. While a magnetic field meter can measure field strength at specific points, it does not capture the entire volume of the magnet. A fluxmeter equipped with a Helmholtz coil addresses this by enabling accurate, volumetric measurement of the complete magnetic field.
A Helmholtz torque coil comes with the fluxmeter
When paired with the List-Magnetik Helmholtz torque coil HM-1, the magnetic flux of permanent magnets can be measured with high precision, as the entire volume of the magnet is accounted for, irrespective of its position. The magnet's influence on the coil is detected as an electrical voltage, which is then converted into a flux value. Besides the HM-1 coil, the device can connect to various types of coils or coil probes, offering significant flexibility in the testing and analysis of ferromagnetic materials.
Graphical integral of the pulse curve
By recording the pulse curve of the flow measurement, the device determines the flow value as an integral, represented by an area on the graph. This area is displayed on a 320x480 pixel LCD touch panel, from which the accurate flux value is calculated. From a technical perspective, the FLUX-CHECK 250 functions as an electronic analog voltage integrator.
No drift
Unlike many fluxmeters, the FLUX-CHECK 250 does not experience drift after being powered on, which typically causes delays before the first measurement or necessitates repeated compensation during a series of measurements. Instead, a trigger value is set to initiate the measurement, automatically using the previous drift value as the zero point. This means the device is ready to measure immediately upon activation, allowing for quick and reliable material testing and analysis without the need for time-consuming drift compensation.
Real flux, Magnetic moment, Flux density
In addition to the magnetic flux (Phi), the device can record further information on the coil and the measured magnet. This data can be used to make additional calculations that support material analysis and precise testing of permanent magnets and other magnetic systems.
The number of coil turns (n) — the "real flux" — is calculated from this.
The coil constant of the Helmholtz coil is used to calculate the "magnetic moment."
The volume of the magnet determines the flux density B.
Data logger and interface
The device offers flexible memory for storing measured values, a dual digital and analog display, and the capability to measure peak values. With its wireless Bluetooth interface, data can be transferred to Windows PCs and apps on Android and iOS devices. It can also connect to an external power source through a USB interface.
Additionally, the device features an SCPI interface that enables remote-controlled measurements and transmission of data during line operations. The USB connection not only supplies power but also ensures continuous operation.
