Vlf or PI?

[Altra]

Someone posted this link on the Detector Prospector forum. I believe it is Russian? Is this a vlf or pulse? Note that the coil is a DOD

https://www.youtube.com/watch?time_continue=22&v=k-TfUuYk-lA&feature=emb_logo

[Carl-NC]

Likely VLF.

[WM6]

Likely VLF.

Yes, they mentioned on their web site IB MF technology, but in video hybride approach.

Google translate:

"This is the first and only one of its kind fully digital, intelligent, working on the technology of
inductively-balanced multi-frequency type underwater metal detector.
The technology was developed by the Novaton Eng team.
The name of this technology: IBIMF."

Interesting details:

"Specifications

- Permissible immersion depth without additional preparation up to 20 m.
-Dynamic operation
-Duplicate motion control
-Metal discrimination mode
- Multi-frequency operation in the range of 500 Hz - 20 kHz
- 7.87 inch triple bipolar sensor with two independent receiving loops
-Adjustable search depth
-Adjustable sensor sensitivity
-Selection of the timing mode of the transmitting circuit - "VAR" (high amplitude resonance) or "NAI" (low amplitude pulse)
-Select filters for complex search conditions
-Adjustment of the gain of the receiving circuit
-Light vibro indication"

[Myntmaster]

I watched the video, read the forums. They declare a lot and beautifully. But on Russian platforms, the people of the new product were wary. This submariner is completely filled with sealant, that is, non-separable. And the price is 500 and 1000 dollars. About chains that takes in salt water from 1.5 grams I do not believe.