A wide variety of secondary materials and additives are required in production processes in the automobile industry. These include acids for regenerating cationic exchangers on the waste water treatment plant.
The secondary materials, for example 32% hydrochloric acid, are stored in small storage tanks. Hydrochloric acid is extremely aggressive, and is made even more so by heating to 32°C. Due to inaccuracies during dilution, the density and composition of the acid can fluctuate. For these reasons the choice of materials for parts that come into contact with the tank contents is severely limited. Even special materials such as Hastelloy are not adequately resistant.
Vega’s guided microwave level sensor
The acid is usually stored in steel tanks containing 1000 to 2500 litres which are up to 3 metres high. To resist the aggressive substances they contain, all the containers are enamel coated. The Vegaflex 63, a fully insulated level sensor, operates on the guided microwave principle and continuously records the content or signals the refill quantity. The PFA-insulated measurement probe is fully resistant to the medium and is therefore ideal for such an application.
The rod probe is mechanically very robust and can withstand turbulence during filling operations. Level readings are transmitted to the downstream process control system for evaluation. Reliable measurements with the Vegaflex 63 enable precise control of filling levels and so increase process stability. The system ensures optimum use of the available tank volume. It also requires minimum time and costs for installation due to its simple commissioning techniques.
For more information contact John Groom, Vega Instruments, +27 (0)11 958 1901, john.groom@vega.com
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