How? Indoor PIR Switch/Sensor

I saw these at a friends rented house, there were no markings and the landlord put them in.
I'd love to buy some but can't find them. I can find the switch and find the sensor but surely they come as a package as the switch would need a receiver?

They look like this. The sensor, obviously, turns the lights on when you walk in the room.

I also have 2 questions; A: Do the lights time out (I assume so) and B: Do they only work on a set ambient light level or will they come on in the daylight as well?

Any help would be much appreciated, TIA

If you can find the switch and the sensor then ask the supplier. As for the rest of it, ask your friend- you've been in the house.

Logically (assuming they're in a communal area) then they will time out- that's the whole point. Sensitive to ambient light- maybe, maybe not. If it were my rental place then I'd probably set them to come on regardless of ambient light (so if anyone does manage to trip down the stairs/throw cooking fat all over themselves it wasn't due to poor lighting)

Oh yeah, system functionality. Loads of different ways of doing it- wire in parallel so the PIR overrides the manual switch, link the PIR to the switch so movement detection triggers a press of the 'ON' button, use a tiny PLC so you can do what the hell you like........

Thank you for your reply.
It was actually the sister of a girl I met recently and probably won't be going back

When I say I can find each piece, I can find PIR sensors and I can find switches that look like that. I can't find how they work together, who makes a set that does etc.

As I say, in my mind, the switch must have a receiver from PIR in.

That said, do these PIR sensors come with receiver plates? I can't see information on any website where you can buy them that shows how they work.
If the sensor comes with a receiver plate, then it could be that the switch in my picture is just a normal switch replacement and that a second switch - the receiver - is just wired in as an addition (possibly that white plate next to the silver one in my picture?)

Walk of shame was it?
I've not looked in detail but I'm assuming that the PIR is wired (it'll need power to operate) and has a pair of volt free contacts that change state when the PIR is triggered (that's how the ones TLC sell work anyway)
The switch- no idea. Again TLC have some touch dimmers but they don't interface directly with the PIR jobbies.
What are you trying to achieve? (One important piece of functionality that will be expensive is the ability to turn off the lights when they've been turned on by the PIR. If you don't need that function then the job is much easier)
PS where did you find the switches- Google Images wasn't helpful

hah something like that

What I'm after is automatic lights via motion sensor and have a switch override.
My thinking is, and this might not be how they work, would be that the PIR sensor can run on a battery and you put a switch with a receiver into the wall where the old switch was.
That makes perfect sense to me as a buyable package.

Have a look at Lightwave- looks the nearest match. Not cheap but not outrageous either. And that switch in your pic is a Lightwave dimmer remote (Google Images isn't that good obviously). http://www.ledbulbs.co.uk/index.php...lFpJ3Vl-47Snpc5eqQ-aBH0iVazFkAe34WhoC1qXw_wcB