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Magnetic coupling for a microbalance

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Abstract

Balances utilising the principle of free magnetic suspension can be very useful for thermogravimetric experiments, where aggressive atmospheres and high pressures are applied. Magnetic coupling systems with automatically controlled attraction can be used for direct conversion of weight into an electric signal or for the separation of object and beam balance. The magnetic suspension balance is described and a new versatile magnetic coupling system is presented. Due to its low weight, this coupling can be combined with a microbalance.

Zusammenfassung

Mikrowaagen mit einer freien magnetischen AufhÄngung ermöglichen eine ideale stoffliche Abtrennung zwischen dem Probenbereich und dem Waagenbereich. Dadurch werden Messbedingungen zugÄnglich wie Arbeiten unter extremen Drücken und unter spezieller, insbesondere aggressiver AtmosphÄre, die besonders in der Thermogravimetrie von grosser Bedeutung sind.

Verschiedene Prinzipien der freien AufhÄngung werden beschrieben und als Anwendungsbeispiel das PhÄnomen des Probenauftriebes in AbhÄngigkeit des Messdruckes dargestellt.

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References

  1. Th. Gast, Measurement, 4 (1986) 53.

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Authors and Affiliations

  1. Institut für Mess- und Regelungstechnik, TU-Berlin Budapester Str. 46-50, 1000, Berlin 30, Germany

    Th. Gast & W. Pahlke

Authors
  1. Th. Gast
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  2. W. Pahlke
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Gast, T., Pahlke, W. Magnetic coupling for a microbalance. Journal of Thermal Analysis 37, 1933–1941 (1991). https://doi.org/10.1007/BF01912225

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  • DOI: https://doi.org/10.1007/BF01912225

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