Patent ID: 7866340

Claim:
A universal pressure reducer for a self-contained breathing apparatus, comprising: an inlet; a reducer module in fluid communication with the inlet; a pneumatic alarm mechanism; and a pneumatic transfer valve assembly that controls the actuation of the alarm mechanism by controlling the flow of pressurized air thereto, wherein the transfer valve assembly is arranged to actuate the alarm mechanism when the pressure of air entering the reducer through the inlet drops to a trigger level that is automatically selected from at least a first predetermined level and a second predetermined level, the trigger level being set to the first predetermined level if the inlet is coupled to a cylinder valve connected to a pressure vessel of a first rated capacity, and being set to the second predetermined level if the inlet is coupled to a cylinder valve connected to the pressure vessel of a second rated capacity, the first and second rated capacities being different from one another and the first and second predetermined levels being different from one another.