Portable light-addressable potentiometric sensor (LAPS) for multisensor applications

Tatsuo Yoshinobu, Michael J. Schoning, Ralph Otto, Koji Furuichi, Yulia Mourzine, Yuri Ermolenko, Hiroshi Iwasaki

Research output: Contribution to journalConference articlepeer-review

62 Citations (Scopus)


A novel design of the light-addressable potentiometric sensor (LAPS) for realisation of a portable multisensor device is presented. Light sources and electronics including an oscillator, a multiplexer, a pre-amplifier and a high-pass filter are encapsulated in a pen-shaped case, on which the sensor plate is mounted. This sensor device is capable of measuring up to four different ion species by integrating different ion-selective materials on the sensing surface, each illuminated with an independent light source. The novel design of the sensor system is expected to make the measurement easier and to enlarge the field of practical applications.

Original languageEnglish
Pages (from-to)352-356
Number of pages5
JournalSensors and Actuators B: Chemical
Issue number1-3
Publication statusPublished - 2003 Oct 15
EventSelected Papers from Eurosensors XVI - Prague, Czech Republic
Duration: 2002 Sept 152002 Sept 18


  • Ion sensor
  • Light-addressable potentiometric sensor (LAPS)
  • Miniaturisation
  • Multisensor
  • Semiconductor


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