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In a non-anesthetizing area, where should the pressure/vacuum sensor be located in relation to the zone valve?

  1. Station outlets/inlets

  2. Source side

  3. Upstream side

  4. NFPA 99 does not specify a requirement

The correct answer is: Station outlets/inlets

In a non-anesthetizing area, the pressure/vacuum sensor should be located at the station outlets/inlets to ensure effective monitoring of the medical gas system's performance. This positioning allows for real-time assessment of the gas delivery pressure and the vacuum levels at the point where it is actually being used, which is critical for patient safety and for maintaining the integrity of the medical gas supply. By placing the sensor at the station outlets/inlets, it provides immediate feedback regarding the function of the medical gas system directly where gas is administered. This contributes to promptly identifying any issues, such as inadequate pressure or vacuum conditions, that could affect patient care. Locating the sensor on the source side or upstream side would monitor the conditions prior to distribution, but it would not provide the necessary data on how the system is performing at the point of use, leading to potential delays in addressing problems that could arise during operations. NFPA 99 establishes standards aimed at ensuring safety and reliability in healthcare environments, emphasizing the importance of having a clear understanding of the working conditions at the delivery point.