« on: January 19, 2016, 01:47:09 PM »
Just heard an interview with John Palmer and he stated he thought the colorphast brand strips were adequate for the home brewer and that he wasn't up for the cost/maintenance the probe styles. I'm just starting to get into the water quality issue and that's why i'm asking. Anyone have any input on these strips or am i kidding myself? I don't know if i need .05 accuracy when it comes to ph.
I used them for a long time. My experience is that they are ok at letting you know if you are in the correct range, but you can't really pin down an exact reading.
They do tend to read about 0.3 too low as Kaiser demonstrated. http://braukaiser.com/wiki/index.php?title=An_Evaluation_of_the_suitability_of_colorpHast_strips_for_pH_measurements_in_home_brewing
They also seem to read the same whether or not you cool the sample to room temperature or just dip them in the mash (at least that was my experience).
$20 for a box of 100 is the best price I've seen: http://www.sanitationtools.com/products/colorphast-ph-strips-single-box
I still use them and that's been my experience, too. I need to break down and get a meter.