Talk:PPM Meter Alt

PPM Meter Discussion

This page is for:

• questions
• comments
• etc...

Temperature Compensation

Has anyone added a temperature compensation function yet??

Shure, why not...

Moved this to its own page Temperature_probe May 31 2009 >:D Wikisysop

Interesting reader comments on probe design

Got this in an email, seems useful so posting here:

"I want to measure conductivity in limewater (for a marine fish tank), so I want an electrode for highly conductive solutions (around 10mS/cm).

After a bit of thought, I used two propelling pencil leads (0.7mm diameter) - I needed only a few mm exposed spaced by say 5mm. Readings after a few months are stable, so graphite leads seem ok for this application. (And to calibrate, just draw a line to make the electrode shorter!)

Clearly they're not suitable for everything, but they are readily available."

thanks...

seems you're good not only in electronic stuff but also in water analysis...  :)

Thanks for such informative and helpful project.

any update on those meters?

like to see your project.......possible?

how's your old meter?

tc.

• thanks for the encouragement. ^_^ I was considering the other night posting the complete source code for the meter. As far as updates, since the meter is working for the moment I've been using it without much changes. Would really like to add in the temperature compensation circuit provided by ElAMPO, for temperature compensation on the pH/PPM readings. :D Hmmz, lastly been using the meter pictured on the page since 2006. Thx again, ~ eris - 2009/03/13