
The Milwaukee waterproof pen series of EC, TDS. (PPM) and pH pens allow you to monitor your nutrient solution for best plant growth. They all feature replaceable electrodes for long life. The batteries will last 1500 hours of use. The pH pen will measure from 0 to 14.0 pH. The EC and TDS pens have automatic temperature compensation for accurate readings. The TDS pen will measure from 0 to 2000 P.P.M. and the EC pen will measure from 0.00 to 10.00 EC. They have a 2 year warranty on the pen and 6 month warranty on the electrode. Calibration solutions for these pens come in a box of 25 sachets. Placing your pH pen in storage solution will lengthen the life of your electrode. The pH pen can be cailbrated at 7.01 and/or 4.01. Each pen comes complete with 3 batteries (replacements sold below).
Cheap and reliable. Has worked great for the last 6 months, with no problems at all. Much better than color-coded liquid test kits, especially when checking run-off ph.
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