I received a differential pressure gauge and on the front plate it is written "P Stat 100 bar" and " P Unil 6 bar". Does anyone know what P Unil is?
P Unil could be related the UNILateral transducer. Anyway, it is no doubt better to ask the supplier or maker. I'd be grateful to read their answer through your posting.
As 25362 wrote, "unil" means unilateral. So this particular differential pressure gauge could be used for example with pressure 94 bar from one side and 100 bar from the other side.