Water Inlet on Head

Need help identifying the sensors on the water inlet that's on the side of the head. I had a couple of "problems" today and two sensors ate it. Tried searching around but I'm not finding much or I'm not using the right terms. Any help is very appreciated.

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Try searching for the "coolant tree"

search for The definitive water outlet thread by cacoman424, has nice pictures.

Yes, this one shows them all:

- viewtopic.php?f=10&t=42290&p=399395&hilit=water+outlet#p399395