Handheld measurement device for field-effect sensor structures: Practical evaluation and limitations

Torsten Wagner, Rob J. Maris, Hans Josef Ackermann, Ralph Otto, Stefan Beging, Arshak Poghossian, Michael J. Schöning

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


A user-friendly handheld measurement device in combination with a field-effect-based capacitive electrolyte-insulator-semiconductor (EIS) sensor has been developed. The measurement device allows the characterisation of various chemical sensors and biosensors in both the capacitance-voltage (C/V) and the constant-capacitance (ConCap) mode. The developed device has been systematically tested with pH-sensitive EIS sensors in terms of accuracy, reliability and noise behaviour. Many possible applications for this type of semiconductor-based sensor with the associated convenient handheld measurement device can be found in the biotechnology environment. First practical aspects and considerations to apply EIS-based sensors together with the new handheld measurement device for pH measurements in a cell-culture medium will be reported.

Original languageEnglish
Pages (from-to)217-223
Number of pages7
JournalSensors and Actuators, B: Chemical
Issue number1
Publication statusPublished - 2007 Oct 20


  • Capacitive EIS sensor
  • Field-effect
  • Handheld measurement device

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry


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