Share Email Print
cover

Proceedings Paper

Design of a miniaturized electrochemical instrument for in-situ O2 monitoring
Author(s): Jordi Colomer-Farrarons; Pedro L. Miribel-Català; Josep Samitier; Martin Arundell; Ivón Rodríguez
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The authors are working toward the design of a device for the detection of oxygen, following a discrete and an integrated instrumentation implementation. The discrete electronics are also used for preliminary analysis, to confirm the validity of the conception of system, and its set-up would be used in the characterization of the integrated device, waiting for the chip fabrication. This paper presents the design of a small and portable potentiostat integrated with electrodes, which is cheap and miniaturized, which can be applied for on-site measurements for the simultaneous detection of O2 and temperature in water systems. As a first approach a discrete PCB has been designed based on commercial discrete electronics and specific oxygen sensors. Dissolved oxygen concentration (DO) is an important index of water quality and the ability to measure the oxygen concentration and temperature at different positions and depths would be an important attribute to environmental analysis. Especially, the objective is that the sensor and the electronics can be integrated in a single encapsulated device able to be submerged in environmental water systems and be able to make multiple measurements. For our proposed application a small and portable device is developed, where electronics and sensors are miniaturized and placed in close proximity to each other. This system would be based on the sensors and electronics, forming one module, and connected to a portable notebook to save and analyze the measurements on-line. The key electronics is defined by the potentiostat amplifier, used to fix the voltage between the Working (WE) and Reference (RE) electrodes following an input voltage (Vin). Vin is a triangular signal, programmed by a LabView© interface, which is also used to represent the CV transfers. To obtain a smaller and compact solution the potentiostat amplifier has also been integrated defining a full custom ASIC amplifier, which is in progress, looking for a point-of-care device. These circuits have been designed with a 0.13 μm technology from ST Microelectronics through the CMP-TIMA service.

Paper Details

Date Published: 28 May 2009
PDF: 11 pages
Proc. SPIE 7363, VLSI Circuits and Systems IV, 73630A (28 May 2009); doi: 10.1117/12.821069
Show Author Affiliations
Jordi Colomer-Farrarons, Univ. de Barcelona (Spain)
Pedro L. Miribel-Català, Univ. de Barcelona (Spain)
Josep Samitier, Univ. de Barcelona (Spain)
Institut de Biotecnologia de Catalunya (Spain)
Martin Arundell, Institut de Biotecnologia de Catalunya (Spain)
Ivón Rodríguez, Institut de Biotecnologia de Catalunya (Spain)


Published in SPIE Proceedings Vol. 7363:
VLSI Circuits and Systems IV
Teresa Riesgo; Eduardo de la Torre; Leandro Soares Indrusiak, Editor(s)

© SPIE. Terms of Use
Back to Top