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Buy Online 3 in 1 pH/TDS/TEMP Water Quality Detector PH Controller With Electrode BNC Type Probe US EU Plug Aquarium Monitor at affordable prices — free shipping, real reviews with photos — Joom
Dennerle pH Controller Evolution DeLuxe
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PH 301 Digital pH Controller Meter Tester with Optional HI/LO Action 0.00~14.00pH Range Replaceable BNC Electrode CO2 Solution|PH Meters| - AliExpress
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Hanna Instruments™ pH Controller and Dosing Pump pH Range: 0 to 14 Benchtop pH Meters | Fisher Scientific