Im working on a control device for pneumatics and Im a bit lost. I need to read two pneumatic signals up to 30psig and have a simple switch actuate a relay if the output of the two pressures differentiates by more than 1psi. Ideally I need to be able to adjust the amount of differential pressure required to actuate the switch by a difference of up to about 5psi.
I found this transducer and I think it will do the reading part.
Digi-Key - 287-1010-ND (Manufacturer - ASCX30AN)
As for the logic, Im lost. I just need something that can handle the output of the above sensor 0-5v (or recommend a different sensor 0-30psig) that I can adjust. This will be powered by a 12vdc battery. I can make a voltage regulator if need be, the above sensor is 5-16v input. This will switch a 12vdc relay. Thanks for any suggestions.