Those seem to be about what I was expecting (hoping??) to find. $125
each plus $10 to $15 for the cable, 0-10volt output. I need two per
system, 5 systems to modify.

Don mentioned Digikey. While they may have what I need, they have 758
pages (no lie, that's what the search engine said!!) that I would need
to sort through. The cheap ones that run about $50 are not refrigeration
grade connections.

Gerry mentioned Omega. Nice stuff, pretty pricey.

Thanks for the responses, now to put it together for the grant.

PS. The new (old) engine is installed on the tractor, rebuilt the carb,
cleaned the gas tank (I've NEVER seen one that gummy!!!), and got the
PTO clutch working. The grass is growing, I was going to be pushing a
hand mower pretty quick.

JohnB wrote:
RoyJ wrote:
Anyone got a quick on-line source for some pressure transducers? I
need a ballpark number for a grant proposal ASAP. These would go on
the high and low sides of a standard R134 refrigeration setup. low
side would be soft vac to perhaps 25 or 50 psi, high side would be 0
to 250 psi. These are lab demos, would not need to be super accurate
but would need to clearly distinguish 1/4 to 1/2 psi. Output would be
something analog, open to suggestions. It would be used in conjunction
with a thermocouple input box so I would need to do some signal
translation somewhere.

And no, I did not google, the stupid tractor is sick, trying to do two
things at once.

http://web1.automationdirect.com/adc...e_Transmitters


You will need to order an M12 size cable for them also , such as this one:

http://web1.automationdirect.com/adc...D12M-0B-070-C1


They have vacuum transducers, and pressure transducers, but I don't see
any of them that cover vacuum and pressure both.