pH test paper Duotest pH 3.5–6.8, with two indicator zones

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.

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Technical Data

90303: Normal pack

Parameter pH
Gradation pH – 3.5 • 3.8 • 4.1 • 4.4 • 4.7 • 5.0 • 5.3 • 5.6 • 5.9 • 6.2 • 6.5 • 6.8
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 1 reel of 5 m length and 10 mm width
Hazardous material No

90313: Refill pack

Parameter pH
Gradation pH – 3.5 • 3.8 • 4.1 • 4.4 • 4.7 • 5.0 • 5.3 • 5.6 • 5.9 • 6.2 • 6.5 • 6.8
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

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Catalog Rapid Tests (EN)
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