Device Operation
Original description of SFD by Owl Industries as of Jan 19, 1993 (part of the filings with BC Supreme Court case C944272) only said that the premise behind device's operation was "that there exist above ground, non-electromagnetic energy patterns reflecting various subsurface conditions", same definition was repeated exactly in Pinnacle Oil International brochure from 1996. NXT Energy Inc. has described SFD in its literature as a device that can measure "changes in subsurface stress fields associated with structural and stratigraphic hydrocarbon traps and reservoirs".
NXT Energy Inc's. description of the device operation explicitly claims that the device detects an aspect of gravity different from that detected by gravimeters and gravity gradiometry, followed by:
"Regionally, tectonics acting on rock mass will cause a slight increase in matter density due to elevated horizontal stress. That in turn will cause a re-orientation of the gravity field in the direction of maximum horizontal stress".
Since it is precisely the orientation, along with rate of change in all directions, of local gravity field that gravity gradiometry measures, it is not obvious what aspect of gravity company's description of the device operation refers to.
All published descriptions of the device's operation indicate that it produces time varying electrical output that in case of movement across terrain can be used to locate subsurface anomalies. While very few examples of device's output have been published, earlier descriptions of the device's operation show increased output activity over faults, fractures and oil fields while current NXT Energy literature indicates the opposite.
Read more about this topic: Stress Field Detector
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