Needle-type in situ water content sensor with polyethersulfone polymer membrane

T. Iwashita, H. Katayanagi, N. Miki

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


A needle-type water content sensor with a polyethersulfone (PES, poly(4-phenoxy-co-4-benzensulfone)) polymer membrane is proposed for the low-invasive, direct in situ measurement of plant water content (PWC). When the PWC sensor is inserted into a plant, the electrical impedance of PES is determined by the amount of absorbed water, which indicates the PWC. In situ measurement of PWC was successfully demonstrated for a strawberry plant (Fragaria × ananassa) and the application feasibility of the sensor to in situ PWC measurement for irrigation agriculture was verified.

Original languageEnglish
Pages (from-to)41-45
Number of pages5
JournalSensors and Actuators, B: Chemical
Issue number1
Publication statusPublished - 2011 May 20
Externally publishedYes


  • In situ measurement
  • Irrigation agriculture
  • Plant water content
  • Polyethersulfone
  • Water content sensor

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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