How do O2 sensors work internally?
11-23-2001, 08:38 AM
#1
On The Tree
Thread Starter
Join Date: Nov 2001
Location: Michigan
Posts: 168
Likes: 0
Received 0 Likes
on
0 Posts
How do O2 sensors work internally Are they nothing more than an EGT probe?
I've played with singe wire EGT probes that use two dissimilar metals to generate a small voltage (Mv) when heated, the voltage is simply feed to a voltmeter that is calibrated to display exhaust temp.
I know the three wire O2's are equipped with a heater (useing 2 of the wires), so that just leaves the one!
Are these O2's just as simple? ... 1002
I've played with singe wire EGT probes that use two dissimilar metals to generate a small voltage (Mv) when heated, the voltage is simply feed to a voltmeter that is calibrated to display exhaust temp.
I know the three wire O2's are equipped with a heater (useing 2 of the wires), so that just leaves the one!
Are these O2's just as simple? ... 1002
11-23-2001, 08:50 AM
#2
TECH Enthusiast
Re: How do O2 sensors work internally
11-23-2001, 09:40 AM
#3
On The Tree
Thread Starter
Join Date: Nov 2001
Location: Michigan
Posts: 168
Likes: 0
Received 0 Likes
on
0 Posts
Re: How do O2 sensors work internally Thanks TA_2001: From what I gathered the O2's do not just measure exh temp but detect O2 content.
Does anyone know the mechanics of how this O2 content is detected by the sensor?
I gota suspect it's some type of chemistry thing!
... 1002
Does anyone know the mechanics of how this O2 content is detected by the sensor?
I gota suspect it's some type of chemistry thing!
... 1002
11-23-2001, 10:05 AM
#4
TECH Junkie
iTrader: (3)
Join Date: Nov 2001
Location: TEXASS
Posts: 3,202
Likes: 0
Received 0 Likes
on
0 Posts
Re: How do O2 sensors work internally The oxygen sensor uses a solid electrolyte(zirconia) sandwiched between two measuring electrodes that reacts with oxygen and produces a MV output. <img src="images/icons/smile.gif" border="0">
[ November 23, 2001: Message edited by: cantdrv65 ]</p>
[ November 23, 2001: Message edited by: cantdrv65 ]</p>
