For careful testing of dangerous, poisonous, or aggressive liquids the strips have the optimal design. The longest available handle effectively protects the user from contact with the sample. This increases the safety of operation and adds handling ease.
pH-Fix Test Strips
Premium color fixed pH test strips from MACHEREY-NAGEL
Users of pH-Fix test strips from MACHEREY‑NAGEL benefit from a high quality product. pH-Fix test strips are used for rapid pH testing directly at the point of interest. They are always ready for immediate use. Coming with a complete color chart the test strips are already calibrated. As single use devices they are completely maintenance free. Their easy handling provides outstanding measurement safety. Just dip - and read!
Always ready for use
Brilliant colors for exact results
pH-Fix test strips feature up to four different indicator pads to cover the complete pH range. The color chart exactly matches both color and position of the pads on the strips. This enables highly precise pH determination and makes the test strips rapid and reliable.
Patented technology for optimal sample protection
In the production, the indicator reacts with the paper of the test pad to form a chemical bond. The dye is fixed to the test strip and cannot bleed into the sample. This protects the sample against contamination and enables measurements in weakly buffered or strongly alkaline solutions.
Instructions and best practice
Determine the pH value of your aqueous sample in three simple steps: dip, shake and read - done! This intuitive handling eliminates application errors and gives you a reliable result in seconds. Unlike conventional indicator papers, pH-Fix's patented technology ensures that you don't have to worry about leaking indicators contaminating your sample.
Watch the video to explore the differences between pH-Fix and our universal indicator papers or Pehanon and see for yourself how quick, easy and reliable pH determination is with pH-Fix.
Dip test strip for 1 s with all test fields in the sample solution.
Shake off excess sample solution.
Compare with color chart and read off the pH.
Sampling with pH-Fix
Sampling is often the biggest source of error in the analytical process. In general, the best practice is to draw an aliquot of the sample and measure the pH in this aliquot. However, when analyzing inhomogeneous samples, drawing an aliquot may alter the composition of the sample. In this case, it is often better to dip the strip directly into the sample. Make sure, to not remove particles from the sample with the test strip. Use pH-Fix test strips only, because indicator papers may release small portions of indicator into the sample. This video shows the best practices for sampling prior to pH testing.
Documented results with QUANTOFIX Relax
The strip reader QUANTOFIX Relax provides objective pH-readings with a selection of pH-Fix test strips. Measurement data including time date and sample ID are printed, stored and can be transmitted to an information system. This allows the rapid and reliable documentation of test results, which proved to be especially useful for QC departments. This video shows how QUANTOFIX Relax can automatically evaluate test strips.
 pH-Fix Test Strips - 100 strip pack |
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| pH Range | pH Gradation | REF # | Order | |||||
| 0.0 - 14 | 1 ˇ 2 ˇ 3 ˇ 4 ˇ 5 ˇ 6 ˇ 7 ˇ 8 ˇ 9 ˇ 10 ˇ 11 ˇ 12 ˇ 13 ˇ 14 | 92110 |
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| 0.0 - 6.0 | 0 ˇ 0.5 ˇ 1.0 ˇ 1.5 ˇ 2.0 ˇ 2.5 ˇ 3.0 ˇ 3.5 ˇ 4.0 ˇ 4.5 ˇ 5.0 ˇ 5.5 ˇ 6.0 | 92115 |
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| 2.0 - 9.0 | 2.0 ˇ 2.5 ˇ 3.0 ˇ 3.5 ˇ 4.0 ˇ 4.5 ˇ 5.0 ˇ 5.5 ˇ 6.0 ˇ 6.5 ˇ 7.0 ˇ 7.5 ˇ 8.0 ˇ 8.5 ˇ 9.0 | 92118 |
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| 4.5 - 10.0 | 4.5 ˇ 5.0 ˇ 5.5 ˇ 6.0 ˇ 6.5 ˇ 7.0 ˇ 7.5 ˇ 8.0 ˇ 8.5 ˇ 9.0 ˇ 9.5 ˇ 10.0 | 92120 |
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| 6.0 - 10.0 | 6.0 ˇ 6.4 ˇ 6.7 ˇ 7.0 ˇ 7.3 ˇ 7.6 ˇ 7.9 ˇ 8.2 ˇ 8.4 ˇ 8.6 ˇ 8.8 ˇ 9.1 ˇ 9.5 ˇ 10.0 | 92122 |
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| 7.0 - 14.0 | 7.0 ˇ 7.5 ˇ 8.0 ˇ 8.5 ˇ 9.0 ˇ 9.5 ˇ 10.0 ˇ 10.5 ˇ 11.0 ˇ 11.5 ˇ 12.0 ˇ 12.5 ˇ 13.0 ˇ 13.5 ˇ 14.0 | 92125 |
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| 0.3 - 2.3 | 0.3 ˇ 0.7 ˇ 1.0 ˇ 1.3 ˇ 1.6 ˇ 1.9 ˇ 2.3 | 92180 |
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| 1.7 - 3.8 | 1.7 ˇ 2.0 ˇ 2.3 ˇ 2.6 ˇ 2.9 ˇ 3.2 ˇ 3.5 ˇ 3.8 | 92190 |
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| 3.1 - 8.3 | 3.1 ˇ 3.5 ˇ 3.9 ˇ 4.3 ˇ 4.7 ˇ 5.1 ˇ 5.5 ˇ 5.9 ˇ 6.3 ˇ 6.7 ˇ 7.1 ˇ 7.5 ˇ 7.9 ˇ 8.3 | 92135 |
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| 3.6 - 6.1 | 3.6 ˇ 4.1 ˇ 4.4 ˇ 4.7 ˇ 5.0 ˇ 5.3 ˇ 5.6 ˇ 6.1 | 92130 |
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| 5.1 - 7.2 | 5.1 ˇ 5.4 ˇ 5.7 ˇ 6.0 ˇ 6.3 ˇ 6.6 ˇ 6.9 ˇ 7.2 | 92140 |
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| 6.0 - 7.7 | 6.0 ˇ 6.4 ˇ 6.7 ˇ 7.0 ˇ 7.3 ˇ 7.7 | 92150 |
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| 7.5 - 9.5 | 7.5 ˇ 7.9 ˇ 8.2 ˇ 8.4 ˇ 8.6 ˇ 8.8 ˇ 9.1 ˇ 9.5 | 92160 |
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| 7.9 - 9.8 | 7.9 ˇ 8.3 ˇ 8.6 ˇ 8.9 ˇ 9.1 ˇ 9.4 ˇ 9.8 | 92170 |
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 Snap Cap Tube with 100 Test Strips (6 x 85 mm) |
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| pH Range | pH Gradation | REF | Order | |||||
| 0.0 - 14 | 1 ˇ 2 ˇ 3 ˇ 4 ˇ 5 ˇ 6 ˇ 7 ˇ 8 ˇ 9 ˇ 10 ˇ 11 ˇ 12 ˇ 13 ˇ 14 | 92111 |
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 Reclosable Poly Bag Containing 10 Strips with Color Chart |
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| pH Range | pH Gradation | REF | Order | |||||
| 0.0 - 14 | 1 ˇ 2 ˇ 3 ˇ 4 ˇ 5 ˇ 6 ˇ 7 ˇ 8 ˇ 9 ˇ 10 ˇ 11 ˇ 12 ˇ 13 ˇ 14 | 921924.CTL.25 |
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| 0.0 - 14 | 1 ˇ 2 ˇ 3 ˇ 4 ˇ 5 ˇ 6 ˇ 7 ˇ 8 ˇ 9 ˇ 10 ˇ 11 ˇ 12 ˇ 13 ˇ 14 | 921924.CTL |
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| 4.5 - 10.0 | 4.5 ˇ 5.0 ˇ 5.5 ˇ 6.0 ˇ 6.5 ˇ 7.0 ˇ 7.5 ˇ 8.0 ˇ 8.5 ˇ 9.0 ˇ 9.5 ˇ 10.0 | 921929.CTL.25 |
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| 4.5 - 10.0 | 4.5 ˇ 5.0 ˇ 5.5 ˇ 6.0 ˇ 6.5 ˇ 7.0 ˇ 7.5 ˇ 8.0 ˇ 8.5 ˇ 9.0 ˇ 9.5 ˇ 10.0 | 921929.CTL |
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| 2.0 - 9.0 | 2.0 ˇ 2.5 ˇ 3.0 ˇ 3.5 ˇ 4.0 ˇ 4.5 ˇ 5.0 ˇ 5.5 ˇ 6.0 ˇ 6.5 ˇ 7.0 ˇ 7.5 ˇ 8.0 ˇ 8.5 ˇ 9.0 | 921930.CTL.25 |
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| 2.0 - 9.0 | 2.0 ˇ 2.5 ˇ 3.0 ˇ 3.5 ˇ 4.0 ˇ 4.5 ˇ 5.0 ˇ 5.5 ˇ 6.0 ˇ 6.5 ˇ 7.0 ˇ 7.5 ˇ 8.0 ˇ 8.5 ˇ 9.0 edit | 921930.CTL |
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