The title says it all. The shown in the picture is a EU based symbol, and we use US based symbols.
Also what does the up-arrow mean?

 

I would say they are electrical pressure switches, the first is adjustable.
Just a guess.
Max.

 

No, this diamond inform us that we have is some kind of proximity sensor. But I don't know what type, maybe a photoelectric one.

 

The one that looks like a switch is a contacts and the top looks like a proximity sensor switch. But I am note sure if the proximity switch and the coil is in parallel or series.

 

What is the part number?

 

Here is a schematic using those symbol

I have no idea about the part number

 

The three electrical terminals may confirm that it is a electrical pressure switch maybe of hall effect technology with O.C. output.
Max.

 

http://www.quia.com/files/quia/users/sfah6922/Electro-pneumatics_Module_5_Teacher_(_Updated).pdf
discusses proximity sensors.

 

I think I got the symbol.

Inside the box there is a proximity switch ll coil contacts. Thanks for helping