Date:   2/3/2009 4:38:20 PM ( 15 y ago)
Hits:   2,147
URL:   https://www.curezone.org/forums/fm.asp?i=1349315

Hi
Could you tell me if a basic TDS Conductivity Tester Hydroponics Meter would do the job?
Something like this...
http://cgi.ebay.co.uk/TDS-Conductivity-Tester-Hydroponics-Meter-0-1999-PPm-c_...




JAB

The meter you are considering has a tolerance of 2% of 0- 1999 ppm TDS. This means it could be off by 39.98 ppm and would be useless as you are measuring 1-20 ppm.

You also need a meter that measures in conductivity Microsiemens uS for silver. The Microsiemen reading is very close to PPM for silver. With a formula you can get it closer.

The second meter I showed you from the Silver Puppy website will measure in both us and TDS and has a huge range. It also has three calibration curves so it is accurate at 0- 20 ppm. You could use it to measure distilled water, Colloidal Silver and tap water.
 

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