Do you need to measure the concentration of NaOH? Anton Paar says yes and here’s why.
NaOH is a major building block in various chemical processes. In the manufacture of other chemicals, soaps, detergents, textiles, paints, glass and ceramics or for water treatment and CIP processes it is used in different concentrations.
An accurate control of the required NaOH concentration is important and can easily be accomplished with the Anton Paar density sensor L-Dens 7400 Version INC or sound velocity sensor L-Sonic 5100 Version MON.
Concentration measurement of aqueous NaOH solutions
Sodium hydroxide (NaOH), also known as caustic soda, is a strong base, which is highly soluble in water. It forms an alkaline solution when dissolved in water and is one of the strongest bases commonly used in industry.
For aqueous NaOH solutions, there is a very good correlation between concentration and density or sound velocity values, making both density and sound velocity measurement ideal for accurate concentration measurements.
Accuracies are achieved as a percentage of concentration by using wither the L-DENS 7400 density sensor or L-SONC 5100 Sound Velocity sensor. The Anton Paar solutions are unrivalled when one considers the price versus accuracy.
It is also important to note that the sensors are delivered with specific concentration formulas embedded into the PICO 3000 electronics at your specific measurement range for optimal performance. The devices are available with a variety of different communication protocols such as 4-20mA, Ethernet IP, PROFINET I/O, Profibus DP etc.
The Benefits
- Linear correlation between NaOH concentration and density or sound velocity – a conductivity measurement shows a reversal point at approx. 15% NaOH
- Quality and safety check at NaOH deliveries
- Real time monitoring of NaOH concentrations for reduction of production and recovery costs
