Sodium Hydroxide (NaOH), Brine (NaCl), Hydrochloric Acid (HCl), Sodium Hypochlorite (NaClO)
Sodium hydroxide or caustic soda, NaOH is used as a caustic base and alkali in a wide range of industries. It is manufactured by electrolysis of sodium chloride solutions.
Typically, sodium hydroxide is delivered in 30-40% NaOH concentrations to customers, who will further dilute it with water for use at concentrations of 14-15 % NaOH. Vaisala Polaris™ Process Refractometer is used to measure the concentration at different phases of the process:
Several choices of refractometer wetted parts material are available for different chemicals.
Learn the details of the chlor-alkali process measurements from the application note.
Download the application note in PDF by filling the form.
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