Re: [PSUBS-MAILIST] Preasure Gauge

[Al Secor <wreckdiver@usadatanet.net>]

George,

Digi-key http://www.digikey.com has several pressure sensors available in
1/8"NPT or 1/4" NPT that would work well.  Check out either SenSym ICT or
Measurement Specialties (MSI). You can get them with either voltage or current
output...I would recommend a .5-4.5V amplified ratiometric output.  The various
sensors are available starting at $70 and going up from there.  Let me know if
you need anymore info.

Al Secor  ARS: WA3PWX  Scuba Instructor SSI PDIC TDI
http://www.geocities.com/SubDiverI



Quoting George Slaterpryce <gslaterp@hotmail.com>:

> I'm looking to make myself some sort of preasure gauge so I can calculate
> depth, but the best Idea I can come up with is to embed a Preasure sensor in
> a ball of silicon and mount it to the outside of my preasure hull, I'm
> thinking that the silicon will transfer preasure to the sensor evenly as well
> as protect it from water damage. The biggest problem with that would be the
> wires coming out of the silicon ball causing rippage if any stress was put on
> them, thus allowing water in however minute amount to get to the sensor, so
> I'd have to make some sort of cradle for it so it can't move... maybe epoxy
> it onto a machine brass craddle that can be mounted to the preasure hull
> which I can then run the wires through so I can connect the Preasure sensor
> to the MC this way I can avoid loose wires. Another problem is would the
> silicon transfer the preasure so I could get an accurate reading.
> 
> Am I over thinking this, is there some simple solution I'm over looking?
> 
> Illustration of what I'm talking about at
> http://www.captovis.com/marine/designsketches/preasuresensorandcradle.png
> Kind of small and all, but I stick my doodles in that directory so I can
> reffer to them later. Kind of like a "design written on a napkin"
> repository.
> 
> Thanks
> George H. Slaterpryce III
> 





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