The most recent gauge I looked at, appears to use the RC method(unless the 10uf caps on each sensor input are added for some kind of filtering?), but it also used a PIC 16f871, which has an ADC.This led me to believe the RC way was somehow better.Two other questions, I'm not calibrating the gauge, or even testing actual pressures, I'm using a pre-calculated lookup table.Since the lookup values are done mathematically, and not experimentally, which method would be the best way to go? And finally, these piezoresistive sensors(I believe they are called, they have a ground and an output, no power) are they generally linear?