Re: a cheap potentiostat ?

On 23 Sep 2003 22:25:54 -0700, [EMAIL PROTECTED] (Adam Seychell)
wrote:

>I am looking for a low cost PC controlled potentiostat for basic DC
>sweep  voltammetry experiments for home use. I'm getting the feeling
>the word cheap and potentiostat should never be used in the same
>sentence. The suppliers define "low cost" as few thousands dollars. My
>requirements are fairly minimal, with +-10mA output and a +-5V
>compliance. The potentiostat hardware seems almost simple enough to be
>home brewed, however setting up the PC software side and data
>acquisition looks more time consuming.

I build a potentiostat printed circuit board that comes calibrated and
ready to go for $150. The power supply for it is another $90. I put it
in a nice case for a customer for $500. 

It is meant to work with gas sensors, but simple modifications will
allow it to be used with an analog input to change the bias. Lower
detection limit is is 10 nanoamps. 

Contact me at this email: [EMAIL PROTECTED] or
[EMAIL PROTECTED] and we'll talk. I have some photos and documents that
go with it. 

Bill Penrose