Greetings all; I'm getting frustrated, but I know it has to be out there, someplace. I need a differntial air pressure sensor, differential so it references local barometric as its reference zero, and up to 10 psi, with a 3 wire analog output. I've solved the control aspect, but not how to detect a pressure to accomplish the control.
automotive EGR types seem seem the most promising as they are affordable and 2 port gismo's but all I can find just lists the vehicles it fits and works with, but zero info on how to hook it up and get an analog reading out of it. "MAP" sensors whose internal reference is a good vacumm can have their signals clipped and massaged into something usable, but so far I've bought 4 w/o finding a working one that actually reads the 14.7 psia of normal air. So how are you folks solving that problem? Or are you burning up the shop compressor feeding your misters? I can't see that as being an acceptible solution since none of those have an intake muffler so you can still hear yourself think. What I have cobbled up at the moment is giving me more than enough air to run a mister, and I can't hear it running over the 2 fans in this 6040 mill. One in the vfd is really noisy. Thank you. Cheers, Gene Heskett. -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
