microtest® Test Kit Specifications

microtest pH 4.5 - 9.0

Colorimetric Test for


pH 4.5 – 9.0

Product Code653000
ContentsIndicator, 15 mL
Cuvette, 4 mL
Colour chart
Instructions for Use
Analytical MethodMixed Indicator Dyes: In aqueous solution, a number of organic substances exhibit an intense colour which is dependent of the pH. These pH indicator dyes change their colour (e.g. blue to yellow) with the pH. The colour shift usually takes place in the pH range of ca. 1.5 pH units which effectively is the measuring range. When combining several suitable indicator dyes, the measuring range can be widened considerably.
Number of Tests200
InterferencesStrong oxidants like chlorine, bromine and ozone may interfere by destroying the indicator dyes.
Measuring RangeThe measuring range is pH 4.5 – 9.0. The colour comparator has 10 colour fields: 4.5–5.0–5.5–6.0–6.5–7.0–7.5–8.0–8.5–9.0.
Shelf Life2 years
ApplicationsDetermination and monitoring of pH in natural waters (environmental monitoring), swimming pools, aquaculture, waste water.