HORIBA LAQUAtwin pH-11 Pocket pH Meter Small Sample Amount min. 0.1mL for Soil, hydroponic, lab, Water, Aquarium, Food, Wine, Beer, Chemical: Amazon.com: Industrial & Scientific
Pocket Meters - HORIBA,日本HORIBA堀场LAQUAtwin紧凑型pH计pH-11B pH-22B pH-33B-Taobao,HORIBA LAQUAtwin pH-11 Pocket pH Meter Small Sample Amount min. 0.1mL for Soil, hydroponic, lab, Water, Aquarium, Food, Wine, Beer, Chemical: Amazon.com: Industrial & Scientific,Horiba LAQUAtwin Ca+ Ca-11 Waterproof Compact Calcium Ion Meter Made in Japan