Hello Reid, Our lab near you specializes in microelectromech device
fabrication. There is the small ISFET that you may know about for measuring pH
but I think that is still too large. We could make a micro-micro sized version
of the traditional Pt meter for pH that might be just what you need. Our lab is
set up for things like that as MEMS is our specialty. You may call me to
discuss if you like at

Prof. William Carr
Director, Microelectronics Research Center
New Jersey Inst of Technology
323 King Blvd
Newark, NJ 07l02
(201) 596 5692 fone
(201) 596 6495 fax