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I dont know ...I think that no one has these two magnetometers to answer this question.
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Infact I too have not seen or heard of Willys mag. From which country it has come or who manufactures this? Please enlight me.Comment
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Hi in all, I have two units from willy, ppmii and ppmiv, I am very thanked from the results and the priceComment
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I think the question about PPM Mark4 by Willy Bayot
see this forum ...
Magnetometers DEEPGEOTECH designed and manufactured in Dubna, Russia.Originally posted by raobn View Post
A town of science.
The town of Dubna was officially inaugurated in 1956, together with the Joint Institute for Nuclear Research (JINR), which has developed into a large international research laboratory involved mainly in particle physics, heavy ion physics, synthesis of transuranium elements, and radiobiology. In 1960 a town of Ivankovo situated on the opposite (left) bank of the Volga was merged into Dubna.
Outstanding physicists of the 20th century including Nikolay Bogolyubov, Georgy Flyorov, Vladimir Veksler, Bruno Pontecorvo used to work at the institute. A number of elementary particles and heavy nuclei (including the 118th element) were discovered and investigated there. In recognition of that, in 1997 the chemical element 105 Dubnium (Db) was named after the town. In 1964 Dubna hosted the prestigious International Conference on High Energy Physics.
http://en.wikipedia.org/wiki/DubnaComment
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Hello Spiridon,
I think some persons are interested in your magnetometer because of the good sensibility , but in your web site.... do not see any address, names etc...to give some trust to the buyers in contacts and when you click buy....where is the cost for the gradiometer with shipping?
Thank you
AlexisComment
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About gradiometer: gradiometer is not yet complete, I think it will take about 2-3 months.
About me: this is no secret : http://who.godaddy.com/whois.aspx?do...rog_id=GoDaddy
but it is always difficult to write about myself a couple of lines.
Originally posted by Alexismex View PostComment
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This PPM comes from Belgium and this is its web site:Originally posted by raobn View Post
http://users.skynet.be/fa352591/index.htm
I am the designer and builder of this instrument.
On this web site, you will find a number of documents with test reports, operator manual and price structure.
WillyComment
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Firmware v 1.9
Added: new "retro" display :
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The tool is interesting but I have some questions whose answers I dont found in your website:
you have a complete list of "technical specifications" of the control unit and sensor?
Which liquid of polarization contains the sensor?
The winding of the sensor is cylindrical, toroidal or thing?
How many measurements per second can reading and how it is adjusted by the update time of coordinate gps?
What distance are the sensors in gradiometer mode?
Would it be possible to use two sensors and two units in differential mode (as a base station and the other as a rover)?
Accept volt battery voltage to 9-12-24?
What kind of batteries you can use?
Tank's very much
Richard GrammComment
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Which "technical specifications" are you interested in?
Liquid: kerosene( liquid parafin) or isopropil alcohol,
Sensor: Cylindrical sensor with opposite direction to the winding, it has a low noise level and a large supply in the signal amplitude , which makes it not critical to the orientation.
Gradiometer is not ready yet, so the sensor is only one.
Battery: built-in Pb 12v 7ah, battery is enough for about 6 -10 hours.
Measurement time: perhaps from 250 ms to 6 seconds, it depends on the fluid and on the required accuracy and resolution.
Measurement Settings
POLAR: Polarization impulse length. It depends on the type of the liquid being used. For isntance, it is 1000 ms for kerosene, 3000 ms for water. The longer the impulse is, the more powerful the signal is and the more precisely it can be measured, but the interval between the measurements gets longer. It is recommended to achieve stable readings from a motionless sensor with long polarization (from 1500 ms) first and then reduce it controlling the stability of readings.
DELAY: Delay between the impulse and the beginning of the measurement. Transition process supression. After a polarization impulse, complex transition processes interfering with the desired signal occur in the sensor. This parameter is set in order to filter them out. 20 ms by default.
MEASURE: Measurement length.
After a polarization impulse, a decaying sinusoidal signal that needs to be measured occurs in the sensor. The longer the signal is measured, the more precise it is, but: The signal length depends on the type of the liquid being used. For isntance, it is 700 ms for kerosene, 2000 ms for water. It is followed by noise. To take a precise measurement, it is necessary to capture as much as possible of the desired signal and as little as possible of the noise. It is recommeded to start at 500 ms and increase it controlling the stability of readings from the motionless sensor.
The entire length of the measurement cycle consists of POLAR + DELAY + MEASURE + coordinate detection time + time to save the data to the flash drive .
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Some photos (Inside the magnetometer):
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deepgeotech
can you tell me the specifications for the resolution or resolutions with different liquids and the accuracy of measure?
A question, but the sensor is a metal box and coils are immersed in the liquid how it's done?
The firmware is already prepared for the gradiometer system and then we can buy only the second sensor, or should change all the hardware and software. (add now that you want to buy a unit).
Tank'sComment
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Regarding specifications: measure the actual resolution is difficult, because, first: it takes a professional laboratory equipment for measurement, and secondly the result of severely affected by external conditions: industrial noise, periodic oscillations of the magnetic field of the earth and so on.
Many equipment manufacturers specify overstated the specifications for their devices in real conditions, it is hoped a resolution of about 0.5 Tesla, although of course in theory it could be much better.
About gradiometer:
theoretically, I have provided the ability to upgrade, but would also require the installation of the second analog amplifier, so do it yourself will difficult.
In addition, as I said, work on gradiometer has not been completed and at this time it is hard to promise.
About sensor:
Now I have developed a better sensor than the one that the photo on the site, it has a much better performance and can operate in the no-resonant modeComment
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Okay so I understand. Then Keep us informed when you have completed the gradiometer. Do you think that will happen within this year, next .Comment
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