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BUDAPEST - In the chemical and pharmaceutical industries the accurate measurement of materials in the stock-storage silos is regulated by ISO standards, so the applicable measurement instruments have to satisfy increased requirements in this industrial area.
The primary demand is high accuracy, independently from the measurement range. The minimal accuracy needed is 5 mm, but in several cases measurement values have to be provided within a measurement error of 1–2 mm. In parallel with high accuracy, the long-term operational stability required is even more stringent. The applicable regulations deﬁne several calibration procedures to be undertaken on an annual basis, without the possibility of transporting the instruments to the factory for any reparation or adjustment. In most cases the special mediums to be measured require explosion-proof instruments. Moreover the instruments have to be suitable for the measurement of materials with a low dielectric constant (εr).
There are two product families of level transmitter solutions developed and produced by NIVELCO Process Control Co. which satisfy these requirements:
In the case of hazardous substances it is necessary to use intrinsically safe devices. In the applications where transparent HART communication is needed to provide remote parametering, NIVELCO offers its new development, the UNICONT PGK-301-B Ex isolated power supply modules.
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This article is published by NIVELCO PROCESS CONTROL CO.
Founded in 1982 to concentrate on the manufacture of industrial level measurement and control products, NIVELCO is now a world-class level specialist, based in Hungary. The NIVELCO strength originates from the solid base created by a family business, ...View company page