<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0187-893X</journal-id>
<journal-title><![CDATA[Educación química]]></journal-title>
<abbrev-journal-title><![CDATA[Educ. quím]]></abbrev-journal-title>
<issn>0187-893X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Química]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-893X2015000400299</article-id>
<article-id pub-id-type="doi">10.1016/j.eq.2015.07.001</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Construcción de un sistema de bajo costo para el uso y evaluación de sensores semiconductores para gases]]></article-title>
<article-title xml:lang="en"><![CDATA[Building a low cost system for the use and evaluation of semiconductor gas sensors]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Delgado-Castro]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas-Bolaños]]></surname>
<given-names><![CDATA[Omar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica Departamento de Ciencia y Tecnología ]]></institution>
<addr-line><![CDATA[Liberia Guanacaste]]></addr-line>
<country>CR</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2015</year>
</pub-date>
<volume>26</volume>
<numero>4</numero>
<fpage>299</fpage>
<lpage>306</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-893X2015000400299&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-893X2015000400299&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-893X2015000400299&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Los sensores semiconductores de dióxido de estaño, representan una opción atractiva para la detección de gases en aire debido a su simplicidad y bajo costo. Esto sumado a la necesidad de contar con una interfaz con el computador para su puesta en marcha, los hace ideales para desarrollar proyectos multidisciplinarios con estudiantes de áreas como Química, Ingeniería Eléctrica, Electrónica y Computación. El presente documento muestra la construcción de un sistema de bajo costo para la evaluación de sensores semiconductores. Dicho sistema consiste en una cámara de exposición, una interfaz electrónica para manipular el sensor y transferir datos al computador, y un generador de metano para su uso en el laboratorio.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Tin dioxide semiconductor gas sensors represent an alternative for gas detection in air because its simplicity and low cost. This coupled with the need for a computer based interface, makes them ideal for developing multidisciplinary projects with students from areas such as Chemistry, Electrical Engineering, Electronics and Computer Science. This document shows the construction of a low cost system for evaluation of semiconductor gas sensors. This system consists of an exposure chamber, an electronic interface to manipulate the sensor and to transfer data to the computer and a methane generator for use in the laboratory.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Graphical user interface]]></kwd>
<kwd lng="en"><![CDATA[Matlab]]></kwd>
<kwd lng="en"><![CDATA[Methane, Gas Preparation]]></kwd>
<kwd lng="en"><![CDATA[Semiconductor gas sensors]]></kwd>
<kwd lng="en"><![CDATA[Arduino board]]></kwd>
<kwd lng="es"><![CDATA[Interfaz gráfica de usuario]]></kwd>
<kwd lng="es"><![CDATA[Matlab]]></kwd>
<kwd lng="es"><![CDATA[Metano, Preparación de Gases]]></kwd>
<kwd lng="es"><![CDATA[Sensores semiconductores para gases]]></kwd>
<kwd lng="es"><![CDATA[Tarjeta Arduino]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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</article>
