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Re: Titania oxygen sensors Archived Message Posted by Darren Bamford on August 11, 2008, 9:27 pm, in reply to "Re: Titania oxygen sensors" Hi Tony see if this explains it better and maybe the answer you are after????? Unlike the zirconia sensor which produces a voltage, the titanium sensor changes resistance in relation to the oxygen content in the exhaust. A reference voltage, usually 5 volts is supplied to the oxygen sensor by the ECU. This voltage passes through the resistive titanium dioxide and the ECU monitors the return (signal) voltage. The titanium sensor makes no reference to the outside air for its measurement. The resistance of the titania sensor varies according to the exhaust gas. If the gas contains excess oxygen (a lean mixture) the resistance is high and around 20 K ohms. When the gas contains little or no oxygen (a rich mixture) the resistance is low and close to 1 K ohm. therefore if we keep it simple then the theory goes like this LEAN = high Resistance , means ECU ref voltage would also be high 4 to 5 volt. RICH = low Resistance , means ECU ref voltage would be low 0 to 1 volt. Just remember it as the same as a NTC temp sensor. Engine cold equals high volts, engine hot equals low volts. just replace cold & hot with lean and rich.... therefore the voltage trend is the reverse to a Zirconia (high volts rich / low volts lean) Ed has the correct theory but the wrong around I think. I await to be corrected Message Thread: Titania oxygen sensors - Tony Sefton August 8, 2008, 8:49 am Re: Titania oxygen sensors - Mark Mcgrath August 8, 2008, 5:49 pm Re: Titania oxygen sensors - Tony Sefton August 8, 2008, 6:36 pm Re: Titania oxygen sensors - Mark Mcgrath August 9, 2008, 6:40 am Re: Titania oxygen sensors - Dave Harney August 9, 2008, 9:47 am Re: Titania oxygen sensors - Tony Sefton August 9, 2008, 7:26 pm Re: Titania oxygen sensors - Graham Bullock August 9, 2008, 8:01 pm Re: Titania oxygen sensors - Michael Whitworth August 9, 2008, 9:12 pm Re: Titania oxygen sensors - Graham Bullock August 9, 2008, 9:40 pm Re: Titania oxygen sensors - Tony Sefton August 10, 2008, 10:04 am Re: Titania oxygen sensors - lee mackintosh August 10, 2008, 7:06 pm Re: Titania oxygen sensors - Michael Whitworth August 10, 2008, 7:37 pm Re: Titania oxygen sensors - Michael Whitworth August 10, 2008, 7:58 pm Re: Titania oxygen sensors - lee mackintosh August 10, 2008, 10:42 pm Re: Titania oxygen sensors - Michael Whitworth August 11, 2008, 1:50 am Re: Titania oxygen sensors - Dave Harney August 11, 2008, 10:53 am Re: Titania oxygen sensors - Ed Kaps August 11, 2008, 6:31 pm Re: Titania oxygen sensors - Darren Bamford August 11, 2008, 9:27 pm Re: Titania oxygen sensors - Michael Whitworth August 12, 2008, 12:14 am Re: Titania oxygen sensors - Michael Whitworth August 12, 2008, 7:21 am Re: Titania oxygen sensors - Tony Sefton August 12, 2008, 8:50 am Re: Titania oxygen sensors - Dave Harney August 12, 2008, 1:46 pm Re: Titania oxygen sensors - Michael Whitworth August 13, 2008, 7:36 pm Re: Titania oxygen sensors - Tony Sefton August 13, 2008, 8:40 pm Re: Titania oxygen sensors - john weddup August 14, 2008, 7:40 pm Re: Titania oxygen sensors - Kevin Apps August 13, 2008, 11:49 pm Re: Titania oxygen sensors - Darren Bamford August 14, 2008, 9:48 pm

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