DUOTEST pH 3.5 - 6.8 (Per reel of 5m length and 10mm width)

• Shows two different colors for each pH-value at intervals of 0.3 to 1 pH-unit

• More accurate reading and good estimation of intermediate values

• pH gradation: 3.5 - 3.8 - 4.1 - 4.4 - 4.7 - 5.0 - 5.3 - 5.6 - 5.9 - 6.2 - 6.5 - 6.8