Usable at any time pH-Fix indicator strips allow for quick and easy on-site determination of a samples pH value. They are ready for immediate use and require no calibration. Color-fixed indicators Unlike conventional indicator papers, the indicator dyes in pH-Fix sticks are chemically bonded to the cellulose fiber. This patented process reliably prevents dye bleeding, even in strongly alkaline solutions. The sample remains uncontaminated and can be used for further analysis. Simple and safe The long plastic handle protects the user from contact with the sample. This enables safe testing of toxic, hazardous, and aggressive liquids. The brilliant color scale is optimally aligned in position and color with the test fields on the strip. The result: a fast, simple and safe determination of the pH value