For use with HM Digital's PH-200 and PH-80. This pack includes 12 separate packs of pH calibration fluid to recalibrate most brands of pH meters.
HM Digital's pH buffer solution comes in powder form, so it's lightweight, takes up very little space, is inexpensive and has an indefinite shelf life.
Click here to read an article about Calibrating and Caring for Your pH Meter, from the July 2010 issue of Urban Garden Magazine. The article was written by Rob Samborn, Director of Sales & Marketing for HM Digital.
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