No matter what your scientific qualification or expertise, pH measurement with Johnson Test Papers' non-bleeding indicator strips is simple and has been provided assurance for qualified persons since 1938. The desired pH value can be tested with simple and rapid pH Indicator non-bleeding strips that ensure precision and quality. Confidently measure the pH value of challenging, hazardous or harmful liquids as the elongated plastic strip keeps the specimen away therefore minimising exposure. Accurate colour charts allow for reliable, simple and rapid measurement with their efficient design.

• Sample contamination is minimised and can be used again for testing as the indicator dyes do not bleed into the liquid
• Since the strips can be held in the specimen until the final colour change is observed, they can be used consistently with minimal risk in weakly buffered solutions
• Colours can be matched accurately with the colour chart as there is no cross contamination between the pads on the strip. No specimen contamination
• Slim packaging provides portability and safety
• Nothing to prepare before use
• Consistent batch to batch measurements against accurately printed colour charts