In a message dated 3/11/05 2:08:44 PM Eastern Standard Time,
dtort@ix.netcom.com writes:
<< I've also heard about 'single wire sensors' and 'wideband' - not sure what
the difference is here. Any thoughts?
>>
The single wire sensor was first used in the early 80's. It outputs a .5
volt signal at 14.7 AF ratio. When the exhaust oxygen is low ( rich mixture )
the output voltage is close to 1 volt. When the exhaust o2 is high ( lean
mixture ) the output voltage is low.
The problem with a 1 wire ( or even a 3 / 4 wire heated sensor) is that a
small change in mixture ( say 15 AF ) will produce the same output voltage as a
18 AF. ( the output is non linear)
A wide band sensor system is more $ but gives you a accurate measure of O2 in
the exhaust. These have dropped in price from thousands to under 500 in the
past few years.
Try the forum http://www.innovatemotorsports.com/forums/index.php? They
also sell a unit with data logging making it a multi use machine.
Harold
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