Amazon.com : Bluelab PROBPH pH Probe for Water, Replacement Electrode for Meter, Monitor, and Controller with Easy Calibration, Tool for Hydroponic System and Indoor Plant Grow : Science Lab Ph Meters :
pH Probe Calibration and How to Care for One - Bulk Reef Supply
PH850-SS Portable pH Meter Kit for Food and Semi-solid Samples, Equipped with LanSen® 753 Spear Probe
Spear Tip Electrode For Penetration 0-13 pH (PE-06HDA) Probe | Inspect USA
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E-367 pH Electrode Probe BNC Connector 200cm Long Cable for PH Meter M – Gain Express
Amazon.com: 0-14 pH 300cm 3000mm 118in Replacement BNC Electrode Probe Connector Cable Sensor for ph Monitor Controller Tester Meter Kit Set Aquarium Hydroponics Plant Pool Spa ph of Saltwater or seawater :
Model 8000, pH Meter with Interchangeable Electrode - PSE - Priggen Special Electronic, 114,24 €
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pH ORP Meter Kit w/ Electrodes, Temperature Probe, SD Card and Power Adapter
Combination pH and Temperature, Plastic, Gel Filled, Digital, Double Junction Probe | ysi.com