CSA ISO 11195:19
Gas mixers for medical use—Stand-alone gas mixers
This document specifies requirements for the performance and safety of stand-alone gas mixers intended for mixing oxygen with another gas for medical use.
This document does not apply to:
a) blocks of flowmeters with separate controls for the flow of each gas;
b) stand-alone gas mixers which mix oxygen with ambient air;
c) stand-alone gas mixers with more than two different gas inlets;
d) stand-alone gas mixers connected to an oxygen concentrator.