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A micro CO2 gas sensor based on sensing of pH-sensitive hydrogel swelling by means of a pressure sensor

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5 Author(s)
Herber, S. ; MESA Res. Inst., Twente Univ., Enschede, Netherlands ; Bomer, J. ; Olthuis, W. ; Bergveld, P.
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In this paper a sensor is presented for the detection of carbon dioxide gas inside the stomach in order to diagnose gastrointestinal ischemia. The operational principle of the sensor is measuring the CO2 induced pressure generation of a confined pH-sensitive hydrogel by means of a micro pressure sensor. The sensor is capable of measuring CO2 with a response time between 2 and 4 minutes and a maximum pressure of 0.29×105 Pa at 20 kPa CO2. The sensor is able to resist up to 1 M HCl acid as can be present inside the stomach. The results are very promising for real application and clinical trials are planned.

Published in:
Solid-State Sensors, Actuators and Microsystems, 2005. Digest of Technical Papers. TRANSDUCERS '05. The 13th International Conference on  (Volume:2 )

Date of Conference: 5-9 June 2005

Page(s):
1146 - 1149 Vol. 2
Print ISBN:
0-7803-8994-8
INSPEC Accession Number:
8659890
Digital Object Identifier :
10.1109/SENSOR.2005.1497279
Product Type:
Conference Publications

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