What component on a regulator senses (measures) outlet pressure?

The measuring element is crucial to the functioning of a regulator as it directly senses the outlet pressure, providing essential feedback for the regulation process. This component typically includes a diaphragm or a pressure transducer that translates the pressure being sensed into a mechanical movement or an electrical signal, depending on whether the regulator is mechanical or electronic.

In a mechanical regulator, for instance, the diaphragm expands or contracts based on the outlet pressure, allowing the regulator to adjust the flow of gas accordingly. This feedback mechanism enables the regulator to maintain the desired outlet pressure by modulating the flow of gas through the system.

The other components serve different functions within the regulator system. The restricting element controls the flow path and can affect pressure changes, while the loading element applies a force that counteracts the pressure sensed, helping to stabilize the output. The spring element provides the necessary force that balances with the pressure sensed, but does not actively measure pressure itself. Understanding the specific roles of each component reinforces the importance of the measuring element in achieving accurate pressure regulation.