Development of a selective carbon monoxide sensor e abdurakhmanov1,4, Kh g sidikova2, z b muradova1 and Z e abdurakhmanova3

Development of a selective carbon monoxide sensor
E Abdurakhmanov^1,4, Kh G Sidikova², Z B Muradova¹ and Z E Abdurakhmanova^3
1Samarkand State University, Samarkand, 140104, Uzbekistan
²Jizzakh State Pedagogical Institute, Jizzakh, Uzbekistan
³Samarkand State Medical Institute, Samarkand, Uzbekistan

⁴E-mail: [e-mail]
Abstract. In this work, the regularities of the oxidation of combustible substances (Н₂, СО, СН₄, and gasoline vapors) in the presence of metal oxides are revealed and catalysts for the sensitive elements of selective carbon monoxide sensors are selected on their basis. The possibility of creating a highly selective sensor using measuring and compensating heat-sensitive elements containing catalysts of different activity to the components of gas mixtures has been experimentally confirmed. The main characteristics of the developed selective carbon monoxide sensors are evaluated. The use of such sensors reduces the error of analysis, increases the instrument readings' stability and service life, and improves reproducibility and selectivity in the continuous automatic determination of gas components in the measurement area.

1. 
   Introduction
   

One of the most dangerous pollutants in the atmosphere is carbon monoxide, which is present in the emissions of both powerful industrial sources of pollution (factories, thermal power plants) and small sources (furnace heating pipes), as well as distributed sources, which are different types of transport [1]; therefore, to ensure the safety of work at many facilities, constant analytical control over the content of CO is required. The problem of carbon monoxide burning measurement is multidimensional: it belongs to the complex of problems of optimal control of combustion processes and is included in the complex of environmental control problems [2]. In the analytical practice of monitoring the content of combustible gases, semiconductor and thermocatalytic methods and sensors are widely used [3-5].
The purpose of this work is improving the selectivity of measuring the volume concentration of carbon monoxide in a mixture of combustible gases by using a selective semiconductor method for determining the concentration of carbon monoxide.

2.