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pH measurement are important in many processes. There is almost none where the pH value does not play a dominant role.

All biological processes depend on the activity of enzymes because they show a pH optimum and lose their functionality if the pH is too low or too high. The pH value is measured in most processes using a glass electrode. This pH glass forms a thin gel layer in aqueous solutions that is highly selective to H+ ions. The pH dependent potential of the gel layer is measured against a built-in reference electrode with a constant potential.

This reference electrode may be a silver wire in contact with solid silver chloride or a calomel electrode. In general, the pH value is a measure of the acidity or the basicity of an aqueous solution.In technical terms, pH is the negative logarithm of the activity of the solvated protons H+. It’s mostly explained as the measure of the proton concentration which is correct for dilute aqueous solutions.

SPH1
Low maintenance sealed unit with gel filled reference cell suitable for general laboratory, swimming pools and water monitoring and control plan.

SPH 2
Low maintenance sealed unit with gel filled reference cell suitable for waste water, drinking water, cooling towers and irrigation.

SPH3 WW
Low maintenance sealed unit with gel filled reference cell suitable for wast water, drinking water, cooling towers, fish farming and
galvanic process.

SPH4 HP
Low maintenance sealed unit with gel filled reference cell suitable for waste water, drinking water, fish farming, ground water and galvanic process.

SPH4 HT
Low maintenance sealed unit with gel filled reference cell suitable for ammonia application, chromium plating, reverse osmosis, galvanic process and bisulphite application

SPH4 LC
Low maintenance sealed unit with gel filled reference cell by external refill suitable for highly acidic solutions, chromium plating, reverse osmosis, bisulphite application, boiler feed water.