The Extech PH90 waterproof pH meter features a rugged IP57-rated outer casing. Suitable for taking measurements in a variety of indoor and outdoor environments, the PH90's flat surface electrode makes it easy to measure pH in liquids, semi-solids, and solids Rugged replaceable flat surface PH electrode for quick on-the-spot PH measurements Features a 2 or 3 point calibration, which automatically recognizes buffer solutions, and pts (percentage of slope) tells you when it's time to replace your electrode. PH90: Waterproof pH Meter – | Best Electrical Testers... Easy to replace sensor is perfect for field or Lab use. Ph Meter Extech PH90 Waterproof | Canada PH And Temperature Meter Portable PH Meter Digital High Accuracy Sensor Temp Acidity Tester Featuring a rugged, waterproof (IP57) housing with flat surface electrode for measuring PH in liquids, semi-solids, and Solids and also displays temperature on the large LCD. 2 or 3 point calibration automatically recognizes buffer solutions (order PH buffers separately) Pts (percent of slope) tells you when it's time to replace your electrode (below 70% or above 130%) , Automatic temperature compensation PH90 is a waterproof PH meter.
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