Patent ID: 8504312

Claim:
An apparatus suitable for comparing gas pressure measurements in a singular sealed apparatus, the apparatus comprising: (a) a rebreather canister lid; (b) a rebreather processor; (c) a rebreather sensor; (d) a rebreather indicator; (e) a rebreather hole; (f) a pod suitable for housing a gas mixture; (g) a relief valve; (h) a gas supply inlet; (i) a gas pressure regulator; (j) a pressure measurement outlet; (k) a gas exit valve; (l) a plug; (m) a pressure sensor; (n) an input device; (o) a processor; and (p) an indicator wherein (A) the rebreather processor receives measurement signals corresponding to partial pressure of a gas present in the apparatus and transmits measurement data for partial pressure, the rebreather processor being attached to the rebreather canister lid; (B) the rebreather sensor produces measurement signals corresponding to partial pressure of the gas present in the apparatus and transmits the measurement signals to the rebreather processor, the rebreather sensor having a connection with the rebreather processor for transmitting signals and being attached to a surface of the rebreather canister lid that is exposed to the gas present in the apparatus; (C) the rebreather indicator receives and indicates to a user measurement data for partial pressure of the gas present in the apparatus, the rebreather indicator having a connection with the rebreather processor for receiving measurement data; (D) the rebreather hole is formed in the rebreather canister lid; (E) the pod is adapted to be removably attached to the rebreather canister lid; (F) the relief valve is integrated into the pod to limit absolute as pressure in the apparatus; (G) the gas supply inlet is integrated into the pod; (H) the gas pressure regulator is integrated into the gas supply inlet; (I) the pressure measurement outlet is integrated into the pod; (J) the gas exit valve is integrated into the pod; (K) the plug removably fills the rebreather hole; (L) the pressure sensor measures absolute gas pressure in the apparatus and transmits absolute pressure measurement signals; (M) the input device permits a user to input a concentration of the gas present in the apparatus and transmits data for concentration of the gas present in the apparatus; (N) the processor receives absolute pressure measurement signals from the pressure sensor, receives data for concentration of the gas present in the apparatus from the input device, calculates partial pressure of the gas present in the apparatus and transmits measurement data; and (O) the indicator receives measurement data from the processor and indicates partial pressure of the gas present in the apparatus.