Skip to main content
Kent Academic Repository

A Microprocessor-Controlled Nitrogen-Dioxide Sensing System

Wilson, Alan, Wright, John D., Chadwick, Alan V. (1991) A Microprocessor-Controlled Nitrogen-Dioxide Sensing System. Sensors and Actuators B: Chemical, 4 (3-4). pp. 499-504. ISSN 0925-4005. (doi:10.1016/0925-4005(91)80158-G) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:22801)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
Official URL:
http://dx.doi.org/10.1016/0925-4005(91)80158-G

Abstract

The electrical conductivity of semiconducting phthalocyanine films shows excellent sensitivity to electron-acceptor gases and in principle provides the basis for a low-cost, low power-requirement, compact sensing system for nitrogen dioxide. However, such films suffer a number of disadvantages, including slow response and reversal, reduced response in humid conditions and, in some cases, chemical reactivity following exposure to high NO2 concentrations or for long periods. We now report the development of a microprocessor-controlled sensing system which has been shown to minimize the influence of these disadvantages. The instrument operates on the principle of controlling the sampling and sensor operating conditions so as to maintain reproducible kinetics, optimum conditions for minimizing humidity effects and minimal risk of reaction with NO2. The results of experiments designed to determine these optimum operating conditions will be summarized and the construction and evaluation of a prototype instrument incorporating these features will be described.

Item Type: Article
DOI/Identification number: 10.1016/0925-4005(91)80158-G
Subjects: Q Science > QD Chemistry
Divisions: Divisions > Division of Natural Sciences > Biosciences
Depositing User: P. Ogbuji
Date Deposited: 04 Oct 2009 19:24 UTC
Last Modified: 16 Nov 2021 10:01 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/22801 (The current URI for this page, for reference purposes)

University of Kent Author Information

Chadwick, Alan V..

Creator's ORCID:
CReDIT Contributor Roles:
  • Depositors only (login required):

Total unique views for this document in KAR since July 2020. For more details click on the image.