Main -> Special analysis -> Water, environment Indicator cards, test kits • Universal Indicator Paper, IDL • pH Indicator Strips Universal pH 0 to pH 14, WINLAB® • pH Indicator Cards, Sticks and Solutions, MACHEREY-NAGEL • Qualitative and Semi-quantitative Testing Cards/Sticks, MACHEREY-NAGEL • Test Kits, MACHEREY-NAGEL