>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... :) Do they use pressure change to calculate the flow rate? Omer -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu