Pressure sensor help

I have built strain guages for medical before. A resistive element is usually
used on top of a metal strip.I used a 2 legged gage from Kyowa
about 16 years ago. You can build up the extra resistors or just use
another gage for the 4 legged design. The gage should match the
metal used for optimum performance. The distributor Digi-Key
may have suitable gages. I don't have time
right now.

The gage I have here is 1 mm in length and a lot less in the other demensions.

greg

Need more info. Pressure? Movement? How would you interface this
setup. Tubing, wires?

I have just used these......
http://www.edwards.com/products/pressuremonitoring/truwave.htm

greg

Thanks for help
I am planning to implant the sensor at the interface between nasal
cartilage and nasal bone in a pig. then i'll connect the sensor using
wires to a wireless transmitter (V-link from microstrain) that is place
on the pig back, it will transmitt real time data to a computer
measuring the pressure created by cartilage on bone, and the pressure
change by time. For this i have to follow the specification of the
V-link manufacturer. I was wondering if we can contact by email so i
can send you the electrical diagram of the sensor iam looking for, My
email is aymandayeh@hotmail.com
Thanks in advance
GregS wrote:

Looking at the V-Link unit, seems pretty well made.
http://www.microstrain.com/2400sg-link_specs.aspx

The inputs Sens+ Sens- Pwr Gnd seems like a pretty straight forward
bridge.

What help do you need? Finding a sensor? Hooking it up? Data transfer?
or what?

Are you keeping these pigs separated? Otherwise, one is sure to "eat"
the wireless unit off the back of another.


Aside. As a kid some 40+ years ago, I used to take apart TV's by hand
to recover usable parts. Living on the farm, I was very pleased when my
dad pulled up a hog shed to be my "private laboratory" where I sorted
and kept my hard won prizes of various resistors, capacitors, coils,
tubes, etc. (TV's were often "hand crafted" back then, and you could
unwind parts from the terminal strips they were soldered to, and get a
used, but serviceable part. Well, eventually the inevidible happened
given the location and previous used of my lab. The pigs broke in.
Mostly they ate all my hard won prizes, and trampled anything not
otherwise immediately appetizing. I was very upset I'd lost my treasure
trove of exotic parts accumulated from a dozen old radios and TV's. My
dad was very happy we didn't loose any pigs. It's taken many years to
gain perspective, but now I'm glad we didn't loose any pigs as well,
such were my humble beginnings.

Beleive me on the difficulty of keeping anything electronic and a pig
in close proximity, I have first hand experience.

--
Randy M. Dumse
www.newmicros.com
Caution: Objects in mirror are more confused than they appear.

There are various sensors available through http://www.mouser.com ,
among others, with links to datasheets and manufacturers' websites.

Good luck.

- Tom Gootee

http://www.fullnet.com/u/tomg

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