Development of conductivity and capacitance sensors for pan boiling
1995
Reichard, R.S. | Broadfoot, R. | Wright, P.G. (Sugar Research Inst., Queensland (Australia))
In the Australian sugar industry the massecuite condition in vacuum pan boilings is mainly measured by conductivity transducers. This paper describes the considerable developments which have taken place in the design of these transducers since the early use of simple A.C. contacting type electrodes. Today radio-frequency types which allow the measurement of the conductivity and/or the capacitance of the process material are being widely used. Sensors have been developed to suit all pan boiling applications in the raw sugar factory and also for all grades of sugar refinery boilings. A design of heated probe which prevents the formation of sugar crust on the surface contacting the massecuite has been developed. This is particularly suitable for use in continuous vacuum pans boiling high purity massecuites.
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