pH Test Kit (4 to 10) No. of Tests – 500 Ph is the standard measure of how acidic or alkaline a solution is. It is a measure of the hydrogen ion concentration in solution. Ph is important because chemical processes take place when water has a certain ph. A ph indicator, giving different colors at different ph is a simple and reliable method to read ph for routine monitoring. Our AQUASOL ph water test kit comprises of a universal indicator, giving clear colours which match the colour chart perfectly. An extremely easy to use product, it finds usage in almost all processes.