Clear Informations about Detector/Scanner Systems based on Ground

Clearly observing a condition as big info pollution for Detector/Scanner Systems...Thus,I aimed some informations for lighting big confusion...Technically,we can summary two main differentiation based on Electromagnetic Induction.EM systems expressed as Active are processing on record principle of receiver as a conclusion of material induction by transmitter...In the other hand,Passive EM Systems are processing on recording/sensing by only receiver conditions of natural material induction.You are right!Classifying on two main category as a whole based on EMI principles Detector Systems has to big role for sensing to systems presented based on ground about Detectors.At this point,I can summary that about carried-out on  active EM systems of matters of near surface geophysics based on Detector/Scanner Systems.Systems identified of this field;

Geonics EM38-MK2

Geonics EM31-MK2

EMP 400 profiler

Nemfis Scanner(AEMP 14)

Geovizer System(14 Channel)

After this point,I especially say that about selective some devices as a conclusion of developing on passive EM concept by actual times(This devices has a focus position by  geoenvironments considering experiments of nearsurface geophysics applications  on active EM concept!!!So,I mean about reached a position followed as dense of development process of this devices).Two examples as most selective of this passive devices are Pro 800 and Geo X4 models of Conrad Sytems. 

Chapter of sensing Natural Induction with passive EM systems is maybe most critique point.Because,this field established  a impulse as very dynamic for development of magnetometer receivers.In this mean,developed very useful examples of devices as metal detector/scanner  with shaping of various magnetometer type.For such a example considering needs of some geoservice firms;

https://www.youtube.com/watch?v=XZCt0wN-yQI&list=LL&index=1

https://youtu.be/6W_YKXD7vOE

Performance tests of System;

https://m.youtube.com/watch?v=rQ4OSlANZUE

https://youtu.be/fKEc_iolEu0