We have the Draminski detector, and whilst it takes a little getting used to to be able to scan quickly every time, it is really good.
HH -not sure about a human one, girly wombs are very different to piggy ones, and there are different detectors for various species, which are set at different frequencies. Having siad that when we consulted Draminski about whether the pig one would work for a dog, they were sceptical, but we scanned a friends dog just to see, and it came back positive which was right.