Tilt and Turn question

[Possom]

If a tilt and turn window is located on a 1st floor, is it possible to restrict the opening of the window, perhaps with a key, so that only the vent opening can be opened and not the full window?

It is with respect to child safety that I'm particularly interested, as if a child can open these fully, then there is an obvious safety issue.

 

[Gazman16]

https://www.google.co.uk/search?q=w...6E-mc7AaayYCwDA&ved=0CCEQsxg&biw=1280&bih=851

 

[Possom]

https://www.google.co.uk/search?q=window+restrictors&source=univ&tbm=shop&tbo=u&sa=X&ei=w-MOVcW6E-mc7AaayYCwDA&ved=0CCEQsxg&biw=1280&bih=851

Oh, those look good.

So, if such a restrictor is installed, is someone still able to fully open the tilt and turn to the vent opening?

The restrictor would only restrict opening the tilt & turn to the full 'door-style' opening?

 

[Gazman16]

Depending on how and where you fit one, You can potentially restrict it any way you wish

 

[God]

Look at the tilt safe part
http://www.dgsgroup.co.uk/catalogues/window_handle/tilt_turn_handles.html