Ph indicators

Additional Remarks

The PEHANON® series covers the entire pH range from 0 to 14 with one universal paper and thirteen narrow ranges which overlap to permit utmost selectivity for the range suited to each particular need. The pH gradations within each strip have been established to offer maximum colour differentiation from one comparison field to the next depending on the individual indicator.
The indicator zone (unprinted field of 6 mm width) is in the centre of the strip, the comparison fields (4 mm wide) above and below same. The strip is submerged in the solution for about three seconds so that all colour zones are wetted whereby the centre field changes colour according to the pH value of the solution and is then compared against the colour field bearing the corresponding pH value imprint.
An invisible hydrophobic barrier just above the top colour field prevents capillary action of the test solution beyond that point and corrosive, toxic or otherwise noxious liquids do not come in contact with fingers which remain clean and dry.