Flux-gate sensors FG-3+

[SimonS]

Perfect replacement for legendary FGM-3 sensors are available at www.fgsensors.com
There can be also find development board's and (in future) magnetometer detector (KIT) for constructors.

[bernte_one]

Looks promising, love the kits

can you produce a Video which Shows the Setup as gradiometer Setup and the sensivity?

[SimonS]

Now I'm working on documentation for MAG-SHIELD (development kit for magnetometer). This is open source project and schematic, PCB and code will be free.
I just made simple video (sorry about quality....) ti can detect small screwdriver more then 30cm. https://youtu.be/T6eOaA1ST0M
But I come also finish magnetometer - logger project in next weeks...