An update on the oil pressure sending unit. I had found exactly one of the correct sending units for sale, a NOS Honeywell part that was listed on eBay for a couple hundred bucks. I didn’t buy it, but I was watching the listing. They dropped the price, I made a lower offer and they accepted. I ended up paying roughly what a normal oil pressure sending unit would have cost from a source like Aircraft Spruce. And, it’s got the exact output that the Westach quad gauge needs. Now I won’t have to build a conversion unit but can just wire this one up directly. These transducers are no longer in production, and if you can find one you’ll pay 8-10 times what I got this one for. If it ever fails, I’ll probably replace it with a cheap one and a converter board — now that I have that figured out.
Update 5/4/17: Transducer arrived, NOS as advertised with a nice sealed electrical connector. This thing will likely outlive me.
