Electro-galvanic oxygen sensor

An electro-galvanic fuel cell is an electrochemical device which consumes a fuel to produce an electrical output by a chemical reaction. One form of electro-galvanic fuel cell based on the oxidation of lead is commonly used to measure the concentration of <a href="/facts/Oxygen/acyn6o8r">oxygen</a> gas in <a href="/facts/Underwater_diving/yhjLjF1H">underwater diving</a> and <a href="/facts/Medical/2fnp90Je">medical</a> <a href="/facts/Breathing_gases/1sUAT6mt">breathing gases</a>.
Electronically monitored or controlled diving <a href="/facts/Rebreather/yGCRxYbx">rebreather</a> systems, saturation diving systems, and many medical life-support systems use galvanic oxygen sensors in their control circuits to directly monitor oxygen <a href="/facts/Partial_pressure/sRw2hj4G">partial pressure</a> during operation. They are also used in oxygen analysers in <a href="/facts/Recreational_diving/vahccGmS">recreational</a>, <a href="/facts/Technical_diving/IljuK7eR">technical diving</a> and surface supplied mixed gas diving to analyse the proportion of oxygen in a <a href="/facts/Nitrox/SvhHPlPY">nitrox</a>, <a href="/facts/Heliox/yyFcEdzY">heliox</a> or <a href="/facts/Trimix_(breathing_gas)/XXf0p7Pn">trimix</a> <a href="/facts/Breathing_gas/1sUAT6mt">breathing gas</a> before a dive.
These cells are lead/oxygen galvanic cells where oxygen molecules are dissociated and reduced to hydroxyl ions at the cathode. The ions diffuse through the electrolyte and oxidize the lead anode. A current proportional to the rate of oxygen consumption is generated when the cathode and anode are electrically connected through a resistor

Electro-galvanic oxygen sensor open-in-new

Electro-galvanic oxygen sensor