RS (Radio Spares) do a hand held pH meter (essentially a sensor amplifier
and an LCD display), stock no. 610-540. They also do a range of probes to
use with it (205-075, 425-803, 425-819). Beware, pH probes are very
delicate, and generally must be looked after and stored in a special
solution. You will also need a collection of buffer solutions to calibrate
the sensor from time to time.
If you are at a University go to the chemistry department. They should have
some electrical pH meters, and could tell you how to look after them.
Andy
--
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Microcomputer Consultant Fax: +44 1524 844011
The Computer Centre Mobile (Orange): 0976 243931
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Lancaster LA1 4YW www.lancs.ac.uk/people/cpaame/cpaame.htm
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sandwiches on Boxing Day" - Vladimir Illich Ulyanov 1920
{Quote hidden}>----------
>From: Bryan S Highland[SMTP:
.....bshighlandKILLspam
@spam@FAU.CAMPUS.MCI.NET]
>Sent: 12 April 1996 21:38
>To: Multiple recipients of list PICLIST
>Subject: bi-directional printer port reading
>
>Nevermind my earlier post, I figured enough out to get it started. If
>anyone
>wants some simple C code for reading the data bits D0-D7 on the printer
>port, just e-mail me.
>
>(but any help on where to find a pH sensor would still be appreciated!)
>
>bryan s highland
>
bshighland
KILLspamfau.campus.mci.net
>