The sentence was poorly placed, causing confusion. The intent was to state that the normal range of voltages you'll see is from 0.2 volts (lean) to 0.7 volts (rich). Dick Benjamin ----- Original Message ----- From: D. Dardalis <dardal@xxxxxxxxxxxxxxx> > In this case, the sensor > >voltage goes lower than 0.45 volts. Usually the output range seen is 0.2 to > >0.7 volts. > > Do you actually mean 0.07? 0.7>0.45! > D^2