Thanks!

Not sure what exactly these DS18B20 sensors will work with, but I like them alot! Very simple little digital self contained units. I bought 10 of them on ebay for $4.50 each, so I have a few more left over to experiment around with. Several will be wired into a test rig wiring that I'll extend off my existing set, then I can run a string of sensors off to test external loops.

It still adds up to a little money, but not bad. I bought the unit used on ebay for $25, bought some cables and the hard drive bay for $40 from CrystalFontz, then another $45 for the sensors, so in the end I have about $110 or so into it.

I like that sleeved sensor, I was going to try out something similar if this doesn't work, but they seem ok right now. I just drilled a hole small enough to slip them through the acetal and encased it all in epoxy which seems to do a good enough job, but not as clean as that...very nice!

I guess the interesting part for me is how unprecise TAT really is. Not sure if everyone else sees the same thing, but even in this little 10 minute run, there is a good 3-5 degree variability in the TAT temps. All the more reason to run very long logged test runs to average that mess out some.

I'm just happy to have it all logged. Now rather than running 5 individual smaller 10minutes tests logging it all down manually, I can just let it rip for a few hours and come back with the work all done..