Re: [PSUBS-MAILIST] depth gauges

[Jon Wallace <jonw@psubs.org>]

Transducers for $125.00 in both current and voltage units.
http://www.gaugestore.com/products.asp?dept=1652

I don't think these kind of transducers require a housing, do they?  
Weld a 1/4 or 1/8 NPT coupling as a thru-hull and thread it in.  You 
could even install a shutoff between the sensor and the thru-hull to 
stop the water if the unit failed.

I also don't think a custom pc board is required unless there are lots 
of parts involved.  I was able to build both a small preamp and amp for 
the hydrophone projects using Radio Shack project pc boards (point to 
point?).  It can get messy, but with a bit of planning you can actually 
get alot of components on it.

I'm happy to follow up on dealer agreements if you have a suggested 
supplier.  However, in most cases it's going to make more sense to just 
do a bulk order and try to strike a price-reduction with the supplier.

Jon


Al Secor wrote:
> Jon,
>
> By the time we order custom PC boards and machine a housing for the pressure sensor, the price difference would be much...if a user was able to do his own pc board or point to point wiring on a perfboard  and machining for housing, that would be different, but for a home-built kit ala "Heathkit", the pressure gauge you found would be the better route.  Maybe PSUBS could become a dealer and get a price break on them!
>
> I DO still plan to pursue the homemade version though if anyone DOES want to go that route.
>
> Al
>
>   




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