Amazon
Refillable pH electrode is easily serviced Analog bargraph displayed on LCD - shows trends in acidity or alkalinity Waterproof to IP57 standard 1, 2 or 3 point calibration automatically recognizes buffer solutions Flat Surface Electrode measures pH in liquids, semi-solids, and solids, Weight: 0.2425084882 Pounds, Manufacturer: Extech
Amazon MarketplaceRefillable pH electrode is easily serviced Analog bargraph displayed on LCD - shows trends in acidity or alkalinity Waterproof to IP57 standard 1, 2 or 3 point calibration automatically recognizes buffer solutions Flat Surface Electrode measures pH in liquids, semi-solids, and solids