How does a vortex precession flow meter work and why is it good for natural gas?
Vortex precession meters detect swirl-precession frequency: no moving parts, turndown 1:15+, low pressure loss, ±1%~±1.5%, integrated T&P compensation — a fit for gas metering.
A vortex precession meter uses forced oscillation: gas passes a swirl generator that imparts rotation, creating a helical vortex that precesses around the axis. The precession frequency is proportional to flow rate and detected by a piezoelectric sensor.
Why it suits natural gas: 1) No moving parts — no wear, long maintenance intervals; 2) Wide turndown (1:15+) covering peak-valley demand; 3) Moderate pressure loss, better than orifice plates; 4) Accuracy ±1%~±1.5%, adequate for general gas custody and process metering; 5) Integrated T&P compensation reads standard volume directly.