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Diazotization vessel

Level measurement in the diazotization vessel

Level measurement in the diazotization vessel
Level measurement in the diazotization vessel

Process data

Measuring task
Level measurement
Measuring point
Measuring range up to
4 m
Sodium nitrite, aniline, acid
Process temperature
+20 ... +24 °C
Process pressure
0 … 0 bar
Special challenges
Aggressive media


In the diazotization process, the individual raw materials for colour pigment production are prepared so that they will react to become diazonium compounds ready for the subsequent ‘coupling’ vessel where they form the final crude pigment or ‘azo dye’. The basic starting materials for these compounds are hydrochloric acid, water, sodium nitrite and the diazo component (usually aniline). To preserve the material quality during formulation, the mixture is kept cool by adding ice or via a cooling jacket. During this process, the level must be carefully monitored and kept constant.

Your benefit

Accurate measurement unaffected by changing product properties
Cost effective
Maintenance-free operation thanks to non-contact measurement technology
User friendly
Simple installation from above

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Industry brochure

Level and pressure instrumentation for the chemical industry