runsongas
Contributor
got a link with the results?
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And the results for testing 21 are actually quite good, it passed and I believe since it exceeded 1.4 j/l WOB it would pass the European standards. Only few regulators did not pass the test and none of them was US Divers. There were no Aqua Lungs in the tests, only small set of regulators was taken for seperate cold water testing and some passed some did not. The last test where human divers evaluated the regulators is actually very instructive, some regulators that scored very high on machine tests (like Poseidons) were judged mediocre by divers.Evaluation of Commercially Available Open Circuit Scuba Regulators.
This includes testing of a 21.