The Extech PH90 pH meter, manufactured by Extech, is designed for environmental testing and water quality analysis. It features an integrated pH and temperature sensor for precise measurements. Common applications include testing freshwater, swimming pools, and wastewater, as well as monitoring fish tanks and breeding environments. https://elecena.pl/product/28942450/extech-ph90-waterproof-ph-meter-measures-ph-amp-temperature-with-flat-electrode 2025-06-12 https://elecena.pl/product/28942450/extech-ph90-waterproof-ph-meter-measures-ph-amp-temperature-with-flat-electrode 2026-04-13