magneometer

[ma330]

hi to wm6 and j-p and other freinds
i need to Practical circuit magnetometer
I need a circuit that can be applied to determine iron in the Earth(from 30cm -3m)
Please give me a circuit to be implemented this feature.
tnx

[J_Player]

hi to wm6 and j-p and other freinds
i need to Practical circuit magnetometer
I need a circuit that can be applied to determine iron in the Earth(from 30cm -3m)
Please give me a circuit to be implemented this feature.
tnx

Hi ma330,
You can find magnetometers that you can build here: http://www.geotech1.com/forums/forum...-Magnetometers

and here: http://www.geotech1.com/cgi-bin/page...e=projects.dat


Best Wishes,
J_P

[ma330]

Hi ma330,
You can find magnetometers that you can build here: http://www.geotech1.com/forums/forum...-Magnetometers

and here: http://www.geotech1.com/cgi-bin/page...e=projects.dat


Best Wishes,
J_P

tank you j-p
I could not find a practical circuit with ferrite antenna that Identify ferrous metals in the soil.
I do not want magnetometer with flc-100 or other .....
I want to be able to practice with the ferrite antenna, the ferrous metals in soil show.
Please introduce in this respect a schematic
best wish

[J_Player]

I need a circuit that can be applied to determine iron in the Earth(from 30cm -3m)...

tank you j-p
I could not find a practical circuit with ferrite antenna that Identify ferrous metals in the soil.
I do not want magnetometer with flc-100 or other .....
I want to be able to practice with the ferrite antenna, the ferrous metals in soil show.
Please introduce in this respect a schematic
best wish

Hi ma330,
There is no practical circuit which can be applied to determine iron in the Earth(from 30cm -3m).
in order to deterimine iron which is the size of a small nail at -3m depth, you need to use a good magnetic sensor such as flc-100 or proton magnetometer. Possibly a Honeywell fluxgate magnetic sensor can find a small nail at this depth if it is configured as a gradiometer. Cheap coil magnetometers cannot give reliable readings into the ground at the depth of 3m for small iron objects. There is also the problem of mineralized ground. If you move the magnetometer over ground that has hot rocks such as basalt, or even sands which contain magnetite, hematite, then you will find a magnetic response much larger than a small nail buried at -3m. This response from hot rocks can confuse your detection so you will not know if you found an iron object, or a hot rock, or mineralized ground.

However, a ferrite can discriminate to tell if a buried metal object is simply hot rocks and iron, or if it is non-ferrous, if extra electronics are added to transmit a VLF signal, then measure the difference in phase angle which is transmitted and received from the ground. This is how VLF metal detectors can tell the difference between iron and non-ferrous metals which they locate.


Best Wishes,
J_P

[ma330]

Hi ma330,
There is no practical circuit which can be applied to determine iron in the Earth(from 30cm -3m).
in order to deterimine iron which is the size of a small nail at -3m depth, you need to use a good magnetic sensor such as flc-100 or proton magnetometer. Possibly a Honeywell fluxgate magnetic sensor can find a small nail at this depth if it is configured as a gradiometer. Cheap coil magnetometers cannot give reliable readings into the ground at the depth of 3m for small iron objects. There is also the problem of mineralized ground. If you move the magnetometer over ground that has hot rocks such as basalt, or even sands which contain magnetite, hematite, then you will find a magnetic response much larger than a small nail buried at -3m. This response from hot rocks can confuse your detection so you will not know if you found an iron object, or a hot rock, or mineralized ground.

However, a ferrite can discriminate to tell if a buried metal object is simply hot rocks and iron, or if it is non-ferrous, if extra electronics are added to transmit a VLF signal, then measure the difference in phase angle which is transmitted and received from the ground. This is how VLF metal detectors can tell the difference between iron and non-ferrous metals which they locate.


Best Wishes,
J_P

tank you j-p
I do not need to be too small to detect a metal object at a depth of 3 m.I need a circuit that identifies a metal object 50 cm to 2 m in depth.Smaller metal at a depth of 50 cm.Respond to iron ore and other magnetic material.Like a ferrous mineral streaks.
Please show me a schematic of a magnetometer with ferrite
tank you very much

[J_Player]

tank you j-p
I do not need to be too small to detect a metal object at a depth of 3 m.I need a circuit that identifies a metal object 50 cm to 2 m in depth.Smaller metal at a depth of 50 cm.Respond to iron ore and other magnetic material.Like a ferrous mineral streaks.
Please show me a schematic of a magnetometer with ferrite
tank you very much

I have no schematic of a simple coil magnetometer circuit that will identify a small ferrous metal object at 50 cm to 2 m in depth.
But you can find many magnetometer circuits which will respond to iron ore and other magnetic material here: http://www.geotech1.com/forums/forum...-Magnetometers
and here: http://www.geotech1.com/cgi-bin/page...e=projects.dat

If you want to find small ferrous metal objects at less than 2 m depth with a cheap coil magnetometer, then you can use the Andy Flind magnetometer.
Geo has this schematic. He is a nice guy. Ask him for this schematic, and I am sure he will post it for you.


Best Wishes,
J_P

[goldfinder]

New magnetic sensors

There are some new magnetoresistive mag field sensors that are actually better than the fluxgate. I have been searching the net and found there is a lot of new research on new materials that are very sensitive to mag fields. See

http://www.sensorsmag.com/sensors/electric-magnetic/low-magnetic-field-sensing-with-gmr-sensors-part-1-the-theor-928

I have need a small simple sensor and these GMR sensors fit the requirements.
Goldfinder

[reza vir]

hi to wm6 and j-p and other freinds
i need to Practical circuit magnetometer
I need a circuit that can be applied to determine iron in the Earth(from 30cm -3m)
Please give me a circuit to be implemented this feature.
tnx

the best magnetometer

[Geo]

the best magnetometer

Not so sensitive magnetometer.
Also the FGM3 are very sensitive when you change the direction....

[reza vir]

thanks geo
Do you think it's good circuit

[Geo]

You need more gain, ac coupling good calibration and...

[reza vir]

thanks geo
IC 3 must change the ؟؟؟