World Pumps recently featured QED!
QED Environmental Systems, Inc. has upgraded its ORP215M-R precision orifice plate wellhead, offering plate exchanges which give more accurate flow measurement with precise adjustment of gas flow, especially at very low rates (below 10 standard ft3/minute).
The new design includes a complete kit of six orifice plates securely attached to the wellhead for quick access. A permanent stainless-steel S-type orifice plate retainer keeps the plates close by and helps prevent loss of the orifice plates. With plates readily at hand, gas fields can be kept properly tuned for the best performance.
Take a look at the coverage here: https://www.worldpumps.com/oil-gas/news/qed-upgrades-precision-orifice-plate-wellhead/