Quote:
Originally Posted by tristancliffe
Accuracy. +- half a bar at best in my experience. Obviously, you can calibrate them correctly, so that that particular sensor is okay, but a replacement sensor would probably give a different value unless re-recalibrated. And for some uses the actual value doesn't matter, it's more the shape of the curve and any dips and bumps that are interesting - e.g. oil pressure. Doesn't matter if you have 3 bar or 2.5 bar really, as long as you don't have dips to zero!
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yep that sounds right to me. The main problem with the VDO sensor is that they are a "mechanical" type sensor in that they have a wiper on a potentioneter inside that cylindrical case. Vibrations tend to kill them, or make the readings jump around a bit. It is important to isolate them from the engine by means of remote mounting and a length of AN hose and the necessary adaptors. Which of course adds to the weight, cost and packaging arrangement.
