Family Owned & Operated Since 1971• Bakersfield, CA
4+2 dual-configuration gas ultrasonic flow meter — combines a 4-path SeniorSonic chordal British Gas custody meter with a 2-path reflective check meter in one body. The +2 reflective check provides continuous independent verification of custody readings. More robust than the 3415's +1 check (two independent comparison paths instead of one). Best when fiscal-transfer reliability requires more than one redundant check path but the full 4+4 of the 3417 is over-spec.
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