Duotest indicator papers combine two different indicator zones on a single strip. The zones are separated by a hydrophobic barrier, which effectively prevents mixing of the reaction colors and increases the mechanical stability. The refill reels of indicator paper come singly sealed to ensure long-term stability and protection against many external influences. They have to be placed in the plastic reel with color scale to be used.
| Platform | Products for pH determination |
| Parameter | pH |
| Gradation | pH - 7.0 • 7.3 • 7.6 • 7.9 • 8.2 • 8.5 • 8.8 • 9.1 • 9.4 • 9.7 • 10.0 |
| Evaluable on reflectometer | No |
| Length | 5 m |
| Width | 10 mm |
| CE certified | No |
| Shelf life (from production) | 3 Years |
| Storage temperature | 4−30 °C |
| Scope of delivery | 3 reels of 5 m length and 10 mm width |
| Hazardous material | No |