A gas delivery system including a gas delivery device (100), a control module (200) and a gas delivery mechanism is disclosed. An exemplary gas delivery device includes a valve (107) assembly with a valve and circuit including a memory, a processor and a transceiver in communication with the memory. The memory may include gas data such as gas identification, gas expiration and gas concentration. The transceiver on the circuit of the valve assembly may send wireless optical line - of - sight signals (300) to communicate the gas data to the control module. Exemplary gas delivery mechanisms include a ventilator (400) and a breathing circuit (410). Methods of administering gas are also described. The gas date is compared to patient data to verify the correct therapy is being administered. An alarm may indicate when the verification process discovers a discrepancy. Communication between the valve and controller is by way of optical line-of-sight transmission.
