pH meter, $22 new?!

Jeeze! An omega.com pH meter for $35.
Or $22 for the meter, $16 for the probe.
Noticed by Roy O. at UW CES.

http://www.omega.com/ppt/pptsc.asp?ref=PHH7X&Nav=grebb01





Now why do these cost $60, or $80 ?

http://www.omega.com/ppt/pptsc.asp?ref=PHH3X&Nav=grebb01
http://www.omega.com/ppt/pptsc.asp?ref=PHH720&Nav=grebb02



Chem joke:

At a recent public lecture I saw a "Science show."

A chemist demonstrated the dangers of toxic zinc vapor.

Needless to say, the audience was galvanized.



Biology:

Plush toys
http://www.giantmicrobes.com/



(((((((((((((((((( ( ( ( ( (O) ) ) ) ) )))))))))))))))))))
William J. Beaty SCIENCE HOBBYIST website
http://amasci.com
EE/programmer/sci-exhibits amateur science, hobby projects, sci fair
Seattle, WA 206-789-0775 unusual phenomena, tesla coils, weird sci

 

A pH meter is not much more than a 7106 voltmeter chip/LCD display and
the probe. You could probably make them for $5 if the market was big
enough.

Best regards,
Spehro Pefhany

 

Done!

http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=514

 

Oops. That's just a conductivity meter.

 

If your device passes a current through the media that is being
tested and the current is measured, then that is what you have
weather the cost is $5 or $5k.

 

-

Is that what you imagine a pH meter does?