Fluxmeter FLUX-CHECK 250

Incomparable compact fluxmeter as a hand-held measuring device for determining the magnetic flux

The compact List-Magnetik FLUX-CHECK 250 fluxmeter is a new handheld instrument of this size for determining the magnetic flux Φ (Phi) of a magnet system or a single magnet.

When testing a permanent magnet or a magnetic system, it is important to know the quality of the magnet and the strength of the magnet's magnetization. Measuring the magnetic field strength with a magnetic field meter is only possible at specific points and does not take into account the volume of the magnet. This task is performed by a fluxmeter with a Helmholtz coil.

The Helmholtz torque coil is optionally available with the fluxmeter

In combination with the List-Magnetik Helmholtz Torque Coil HM-1, the magnetic flux of permanent magnets can be determined very precisely, since the entire volume of the magnet is measured, regardless of its position. The effect of the magnet on the coil is measured as an electrical voltage and converted to a flux value. In addition to the Helmholtz HM-1 torque coil, all types of coils or coil probes can be connected to the instrument.

Graphical integral of the pulse curve

The recording of the recorded pulse curve of the flow measurement results in an area which, as an integral, gives the flow value. This area is displayed graphically on the LCD touch panel with a resolution of 320x480 pixels and the correct flux value is calculated from it. Technically, the FLUX-CHECK 250 is an electronic analog voltage integrator.

No drift

The drift that many fluxmeter show after switching on, which leads to a longer waiting time until the first measurement or which has to be compensated again and again in the course of a measurement series, does not occur with the FLUX-CHECK 250. A trigger value is entered from which the measurement starts and the previous drift value is automatically taken as the zero value. The instrument is ready for measurement immediately after switching on.

Real flux, Magnetic moment, Flux density

In addition to the magnetic flux Φ, other information about the coil and the measured magnet can be stored in the instrument and used to calculate additional information:

The number of turns of the coil (n) - this is used to calculate the "real flux".
The coil constant of the Helmholtz coil - this is used to calculate the "magnetic moment".
The volume of the magnet - this is used to calculate the flux density B

Data logger and interface

It offers flexible data storage, a combined digital and analog display, and peak-to-peak measurement. The Bluetooth interface allows data to be transferred to a Windows PC and to apps for Android and iOS. The USB-C interface allows permanent connection to an external power source.

An SCPI interface is implemented on the device, which allows the device to perform remote measurements in line operation and provide measured values. The connection is made via USB, which also ensures power supply and continuous operation.

Manage and send measurement data with a free application

To further process your measurement data, you can pair your measuring device with mobile Android and iOS devices. Or you communicate with a Windows PC. This is made possible by Bluetooth Low Energy technology (BLE). With the Lima Connect app you can manage projects and assign the measuring points on a photo. The measurement results can be statistically evaluated and displayed graphically. The app for Android, iOS and Windows is free.

Technical data Fluxmeter FLUX-CHECK 250
Measuring units:	magnetic flux mVs (milli-Volt-second, corresponds to the SI unit mWb / milli-Weber) Measuring ranges: 0-10 mVs and 0-250 mVs, automatic or manual range switching Real flux: mVs / n Magnetic moment: mVs * cm Flux density: A/cm or mT
Accuracy:	2%
Repeatability:	1%
Resolution:	0.001 mVs
Input resistance:	33 kOhm
Display:	LCD touch panel color 320x480 pixel
Multilingual menu navigation:	German, English, Italian, French, Spanish
Data logger:	10,000 measurements, flexibly divisible
Statistics:	Count / Maximum / Minimum / Average / Standard deviation
Interface:	Bluetooth Low Energy interface for communication with Android, iOS and Windows
App for Android, iOS, Windows:	free of charge via Google Play Store, Apple App Store, List-Magnetik website
External control:	via USB-C and SCPI communication interface
Power supply:	3x 1.5 V AA Mignon. External power supply can be connected via USB-C
Operating time:	approx. 25 hours with battery, unlimited with external power supply
Dimensions:	150 x 85 x 35 mm
Weight:	320 g with batteries

Helmholtz Moment Coil HM-1

The Helmholtz HM-1 Moment Coil is a 90 mm inner diameter coil that allows you to measure the magnetic flux of a magnet with the Fluxmeter FLUX-CHECK 250. Through the observation hole you can see the position of the magnet from all sides.