
Fully redundant 4+4 gas ultrasonic flow meter — two complete field-proven 4-path British Gas chordal meters in one body. Both sets are individually OIML R137 1&2 Accuracy Class 0.5 certified, providing matching custody-transfer accuracy from each independent set. Used at high-stakes fiscal transfer points where a single 4-path failure cannot cause loss of custody data — pipeline interconnects, large gas storage transfer, LNG export terminal headers. The most rigorous gas-USM redundancy short of two separate spools.
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