>> www.dwyer-inst.com > Excellent! If LPM fits, then it is the best buy! Thank you! You can also check out http://www.captor.com/ -- click on the "flow captor" link. They have various flow switches. Their advantage is that they don't have any moving parts in the liquid. (I worked on some of them... :) ge -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body