Device for measuring oxygen concentration in gaseous mixtures containing helium and/or hydrogen

摘要

device for measurements of oxygen concentration in the gaseous smesu00edch containing helium and / or hydrogen, especially for potu00e1pecsku00e9 breathing devices, consists of a sensor (100), tvorenu00e9ho mernou tube (1),opatrenou input hole (8) to follow merenou respiratory gaseous smesu00ed and an outlet (9) for prebytek gaseous smesi,also equipped with a first odbockou (10) and the mutual interval of usporu00e1danu00fdmi second odbockou (11), and the third odbockou (12).while the first about a spur...... off (10) at the opening (8) is opatrena with a tracker (2) of sound pulse, while the second one about a spur...... off (11), and the third about a spur...... off (12) are opatreny microphones (3, 4).pripojenu00fdmi to circuit (5) measurements of casovu00e9ho difference priju00edmanu00fdch sound pulse and through pocetnu00edmu block (6) with the output (7) in the form sbernice to command the control and display obvodum.