When the endurance tests on the ambu bags showed the bags fail rather rapidly, Jef & the team decided to develop a bellows-based machine.
Version 2 uses a custom-built silicone bellows, that went through 2’000’000+ actuations without visible wear.
The machine is half the size and 60% of the weight of version 1.
It implements an oxygen mixing system that can deliver FIO2-values of 21 to 100% with +-5% accuracy, while taking oxygen input from a 5-bar pressure line or a low-pressure oxygen generator.
While the design implements a custom-built bellows, the mechanics and electronics use the same widely available automotive parts as version 1.