Here's a quick try at identifying some of the features. Too bad we're not seeing the other side of the helicopter, there might be some interesting stuff there...
What I am missing is ESM sensors. I don't see any forward (unless they're behind the nose surface which looks like a radome) and i don't see any at the back, unless they're under two slightly differnt panels, one on the each side of the rear landing gear (Not marked in my image)
Of course, it may very well be that if this is a demo craft that certain systems like ESM are simply not fitted yet.
Here's some other observations: Radar, if fitted, should cover AT LEAST both sides and frontal sector. Ideally, it might also have 360 coverage but that may not be as important. But the way the two panels i labeled as possible side looking radar are positioned, there's no way they can properly cover the frontal sector. Which leads me to the assumption that the nose radome looking thing is exactly that - a radome covering a fully functional search radar. Certainly the big box behind the nose, visible through the small window, suggests there's a lot of electronics there.
Unlike SH-60, which doesn't feature a radar there and has the EO sensor up over the nose, the EO sensor seems to be placed below the radome on Z20F. Which would in theory leave enough space for a functioning radar.
Is the nose bigger than the one on utility Z20? Hard to tell for sure, but it does appear it might be. If so, it might house a proper search radar.
What is really weird though is the big side doors. Unlike on SH60, which has seemingly narrower door, this helo seems to feature the side door as wide as on the utility version. Which leaves no room for the weapon pylon. Due to distribution of mass, weapon pylons should very likely be just behind the door. Or in the space where the door will be when slid to the side, to keep them opened.
Is it possible weapon pylon will somehow be placed just below the door? Possibly, but i see no attachment point yet. And would that allow enough clearance? A more complicated pylon, going up and away from the fuselage, might be needed then.
I've no idea what the round thingy underside might be, which i labeled with questionmarks. It seems way too shallow to be a radar. And way too big for any sort of antenna, to be placed on the belly. Perhaps it might be some other kind of submarine hunting sensor, though, something that looks straight down.
The folding tail is nicely visible, as is the whole folding stabilator section. Also, while it's hard to tell and be sure, the whole fuselage to tail joint seems to be different from Z20 and less pronounced, with a smaller curve. Almost as if it's closer to UH60/SH60 with a tail underside sitting a bit lower than on regular Z20, with less of a joint curve.
