THEORETICAL AND EXPERIMENTAL-DETERMINATION OF CELL CONSTANTS OF PLANAR-INTERDIGITATED ELECTROLYTE CONDUCTIVITY SENSORS

Authors
OLTHUIS W STREEKSTRA W BERGVELD P
Citation
W. Olthuis et al., THEORETICAL AND EXPERIMENTAL-DETERMINATION OF CELL CONSTANTS OF PLANAR-INTERDIGITATED ELECTROLYTE CONDUCTIVITY SENSORS, Sensors and actuators. B, Chemical, 24(1-3), 1995, pp. 252-256
Citations number
4
Categorie Soggetti
Engineering, Eletrical & Electronic","Instument & Instrumentation
Journal title
Sensors and actuators. B, Chemical → ACNP
ISSN journal
09254005
Volume
24
Issue
1-3
Year of publication
1995
Pages
252 - 256
Database
ISI
SICI code
0925-4005(1995)24:1-3<252:TAEOCC>2.0.ZU;2-P
Abstract
In this paper, an analytical expression is presented for the cell cons tant of planar-interdigitated electrodes used as electrolyte conductiv ity sensors. The result of this expression is compared with results of measurement carried out with several differently shaped planar probes provided with a thin Ta2O5 insulating film, showing good agreement. M ore than 10 different devices have been fabricated with predicted cell constants ranging from 0.14 to 4.44 cm(-1). The measured cell constan ts are typically 10-20% smaller, possibly due to fringing effects.