Horiba LAQUAtwin pH-11 Compact pH Meter, # 3999960122
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HORIBA LAQUAtwin pH-22 Pocket pH Meter Accuracy +- 0.01, Small Sample Amount min. 0.1mL For Soil, Hydroponic, Lab, Water, Aquarium, Food, Wine, Beer, Chemical Compound: Amazon.com: Industrial & Scientific
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Horiba LAQUAtwin pH-11 Compact pH Meter, # 3999960122
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