How do you measure manifold gas pressure through a regulator control valve?

To measure manifold gas pressure through a regulator control valve, you typically install a pressure gauge on the downstream side of the regulator, where the gas exits. Ensure the gauge is calibrated for the specific gas type and pressure range. The regulator adjusts the upstream pressure to a desired downstream pressure, and the gauge will reflect the actual pressure being delivered to the manifold. Regular maintenance and calibration of the gauge are essential for accurate readings.