Additional Oil Pressure Switch

Kevin,

Yes, I've pretty much made up my mind to go with the additional warning available on the Dynon.  I also agree with your comment no. 4, all three sensors are powered by the same output.  As I mentioned in another reply I suspect the faulty MAP sensor affected the output voltage (IIRC it was +5V) and that caused the Dynon software to detect a problem on all three sensors and "X'd" them out.  BTW my neighbor now carries a spare MAP sensor because of that incident.  Thanks for your comments.  Although I've never seen an oil pressure sensor leak, I remember that Ford had a problem with the brake fluid switch leaking which lead to a fire in some of their Explorers.  I don't need that problem!

You could generate a separate +5V regulated supply to power the MAP sensor if that was a concern. That would then remove a potential cause of the oil pressure sensor not reporting correctly.

Absolutely, I've also thought about a 25uF capacitor on the power lead of the MAP sensor, but so far we've only had one MAP sensor fail.  At our airport we've got three aircraft with Dynon avionics and I'll keep an eye on them.