I use a Hanna PWT meter from Silvergen. It has served me well for about 4 years now, and as long as it works, I see no need to get a different one. So far I've never had to change the batteries, even. But I think if I was buying a meter today, I'd give serious consideration to this one:
http://silverpuppy.com/com100%20meter.html

Many people are happy with a TDS meter, but for me, those do not measure below uS 1.0 so TDS would not work for me. My main use of the PWT is checking distilled water to see if it is pure enough to give me clear CS.
sol

jessie70 wrote:
Sol what do you use to measure the CS? Jess


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