Which crank sensor?

My 2010 Clio 200 needs a new crank sensor due to it cutting out and then struggling to start. I replaced it with a non genuine part. This fixed the fault temporarily but now it's the same symptoms. Renault have informed me that there are two possible crank sensors that will fit my car but they cannot tell me which one I need.

Can an anybody give me a part number for the one I will need?

cheers, Mike
 
are they confusing it with the cam sensor - thinking theres 2 when in fact one is crank and the other cam sensor?

I didn't think there were 2 different ones...

ps - look in this section there are pictures...