<p>The Hanna PWT meter does not measure silver but can be a useful tool when used correctly. </p><p>Here is how it would work. Measure the water before and let us say it has a conductivity of 2 uS. Then you brew the CS and take another reading. Let us say the reading is 15 uS, subtract the initial reading of 2 uS and you get 13 uS. So if nothing else was introduced, then the change in conductivity must be the silver ions. </p><p>I was able to compare the silver I make with my generator http://meissnerresearch.com/products/silver-generator and tested by the Hanna PWT against the professional lab run by Frank Key using a plasma photo spectrometer. </p><p>Just by luck the reading of the Hanna PWT meter in uS is almost the same as the PPM of the silver ion concentration.</p><p>This uS to PPM relationship may not hold true for silver generators made by other manufacturers.</p><p>The Hanna PWT cannot measure colloidal silver particles. If the sample only contained silver particles then the Hanna PWT would read zero. This is not likely in the real world. MesoSilver is 80% particles and 20% ions.</p><p>So the answer is YES the Hanna PWT can measure the ionic CS solution strength. </p><p>Jim Meissner </p>