Field Cancelling System MR-3

Magnetic Field Cancelling System MR-3

MR3-b
3-axis magnetic field cancelling system for electron microscopes (SEM and TEM), electron and ion beam experiments, nanotechnology, biomagnetic investigations, etc. High reliability through rugged analog design. No tedious programming, no chrashs. More than 1600 MR-3 systems sold worldwide.

The magnetic field is measured with a low-noise 3-axis fluxgate sensor. The controller unit contains the sensor and control electronics and power amplifiers for the direct connection of compensation coils. Quasi-static DC magnetic field changes caused by trams, subway, trucks, and elevators are effectively reduced as well as AC magnetic field from power lines.

MR-3-frame-detail2
(Aluminum frame with integrated compensation coils for SEM)

Suitable compensation coils can be easily made from cable loops which are installed to the walls of the laboratory. We also offer complete systems with compensation coils installed to the walls or integrated in a self-supporting aluminum frame.

3-axis magnetic field cancelling
Frequency range DC to 1 kHz (version FAST MR-3 up to 10 kHz)
Fluxgate magnetic field sensor with sub-nanotesla resolution
Simultaneous cancelling of quasi-static (DC) and AC magnetic field
Typ. 40 dB field reduction at 50/60 Hz
Typ. 20 dB field reduction at 250/300 Hz
Magnetic field displays and alarm function

MR-3-offon-detail
(SEM image improvement)

Download data sheets here: pdficon small Data sheet MR-3 Data sheet FAST MR-3