>>>This must show that they switch opposite to the other type of 02 sensor.<<<
There are more than two types of O2 sensor!
A wideband sensor is not a titania sensor infact they use the Zirconia principle but with 2 cells rather than 1!, Having said that I have just found an article that describes two types of wide range single and duel cell sensors.
We also have PLANAR sensors, LAF sensors, Linear sensors, are all these different terms for the same thing or do they have suttlee differences?