I need to build Marine Magnetometer (Simple and Functional)

[sss3570]

I would like to build a marine magnetometer to be towed in a calm sea 25 meters deep (bottom).

Someone even built this proton magnetometer ?
Signals from the Subatomic World: How to Build a Proton Precession Magnetometer

https://www.amazon.com/Signals-Subatomic-World-Precession-Magnetometer-ebook/dp/B009L4OB0G/

I know they are primitive equipment for the current standards, but, for my need, knowledge in analog electronics and financial condition .....


AQUASCAN x25 - manufactured year 2004

https://www.aquascan.co.uk/X25MAG_Issue1.pdf

AQUASCAN MC5 PROTON MAGNETOMETER - manufactured year 2008

https://www.aquascan.co.uk/HB_MC5_PES_PET_iss6_Mar08.pdf

Suggestions and advice are very welcome !!
Thank you in advance.

[bklein]

What if you were to take a magnetic locator like the Schonstedt GA-52CX and waterproof it? They are found on ebay for less than $300 occasionally. There are other brands too, like CST/Berger.

[kt315]

may be FM of Carl? https://www.geotech1.com/cgi-bin/pag...e=projects.dat

[sachindra]

Use some fluxgate magnetometers like previous user said. Depending on what you exactly are interested to measure, you can have it uni-directional or multi-directional.

I made a frame with wheel having 16 fluxgate magnetometers to scan a parking lot. For the magnetometers, datalogger, wires, cost was around $1500.

You will not need that many mangnetometers or datalogger with many channels. For $300 to $500 you can get pretty good system that you can connect to laptop for real time viewing or store data for later.

I 3D-Printed the case to mount the magnetometer on aluminium frame. You will need to make your tube or device water-tight. I have no experience of that but some silicon and watertight sealant can help you make the system watertight. Or some watertight enclosure. In fact- after you have made proper connection you can put the magnetometers in a casing (like a pvc pipe) and epoxy coat the pipe with few layers, that might help you.

Best of luck.