Electrical schematic sensor symbols.

Hi

Sorry for not writing in German. I don't speak this language. I've been redrawing electrical schematic in KiCAD, to digitalise it for easier search, translations etc. I do understand electrical schematics in general, however I don't quite understand sensor symbols. Some symbols have "Q", "P" or B6 like symbol. Do you know which letter means what ?

Below (work in progress) I've attached sample digitalised schematic.

 

Sensors are determined in german speaking countries with character B. They transfer other units like temperatures or pressure, etc. into electrical signals. The type of sensor is international ( english):
p - pressure
t - temperature 
small greek theta character (as on B6) - temperature
v - volume
Q - quality a bit misleading as it is used for volume.

Thank you. Makes perfect sense.
Q = quantity (or volume)
B7 measures fuel level
B2 measures oil level

Moin,
B1= Oil Pressure
B2= Oil Level
B4= Air Pressure Brake Circuit 1
B5= Air Pressure Brake Circuit 2
B6= Temperature Engine Coolant
B7= Fuel Level