Hi,
I've been away for a few weeks and still need to get back to
some folks.
Thanks very much to all who have responded, you've been
incredibly helpful and generous.
I've received some very promising leads,  but I'm still
figuring out how suitable the
various pump strategies are to my applications in the marine
environment.
Anyway here's the summary to my question on uL pumps, the
original querry is at the bottom

Nigel Sharma at UW has this cool piezo pump with no
moving-part valve
 http://lettuce.me.washington.edu/~micropump/

Jim Millar at Mesosystems has a commercial piezo unit (from
IMM in Germany)
http://www.mesosystems.com/products/microfluidics/micropump/

Lutz Haase (lutz.haase@imt.unine.ch), J.G. Smits
(jgs@enga.bue.edu)
are both working on piezoelectric pumps.

Sony Lemhoff ((sony@llnl.gov) and Abe Lee (aplee@darpa.mil)
have developed a Magnetohydrodynamic pump.

Thanks to all,
Thomas Chapin

***************************************************************************

Original Posting:

At 11:23 AM 2/3/99 -0800, Thomas Chapin wrote:
>Hi,
>
>I realize that you folks look at your pumps under a
>microscope and think in terms of nL and uW, but I was
>wondering if anybody had any sources for slightly larger
>pumps. I'm searching for a pump in the 10-1000uL/min range
>for oceanographic applications. Hopefully it would be an
off
>the shelf pump and would ideally have the following
>characteristics:
>
>1) low power/low current, something <1W, 10-50mA.
>2) long duration, the pump would only operate 5-10
>minutes/hour but I'm looking for 6-12 month duration.
>3) flow rates from 10-1000uL/min, hopefully reversible.
>4) capable of being immersed in oil for underwater use at
>high pressures.
>
>I've looked at mini peristaltic, solenoid pumps, micro
>syringe, osmotic, etc. but they all have problems either
>with power, longevity, or lack of fluidic control. I did
see
>a web announcement from MEMStek in WA about a small
diaphram
>pump but as far as I can tell, they're no longer in
>business. Anybody got any ideas? I'm not on the MEMS email
>list so could you please email me at tchapin@mbari.org.
>
>Thanks very much for your help,
>
>Thomas
>
>*************************************************
>Dr. Thomas Chapin
>Monterey Bay Aquarium Research Institute
>P.O. Box 628
>7700 Sandholdt Road
>Moss Landing, CA 95039
>
>phone: (831) 775-1841
>fax:   (831) 775-1620
>email: tchapin@mbari.org
>www.mbari.org
>**************************************************
>
>