> > Perhaps you could test various > > models from small battery operated to canister and up, until you find > > one that doesn't exceed the size limitation, yet gives you your 0.5 > > atm. >=20 > Ordinary vaccum cleaners don't generate anywhere near .5 atmosphere. But could be another way of driving a venturi. --=20 Scanned by iCritical. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .