"I plan on opening up my VT grade kit at the end of the season and sampling that with the Hanna. Has anyone done that yet?" Quote from abbott.
While that might be entertaining, it may not answer many questions. The Vt. Temporary test kit is very Temporary. That is why they have a expiry date. The samples are the darkest each grade can be and still be labeled as such, but they keep gradually changing as they age.
As far as the Hanna Grader meter, the sample cuvette is made specifically to be used with that meter. It is measuring the % of light passing thru the sample. It will be accurate only if you follow the specific instructions, the cuvette must be perfectly clean inside and out, it must be totally dry before filling, it must be filled to the line exactly and you must hold it upright. Then the programming will tell you what % of the light is passing thru. I like it because it removes any doubt, there is no guessing if it is lighter or darker than the sample in the test kit.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.