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<p>(EWSN). As of 2010, wireless sensor networks had deployed approximately 120million remote units worldwide.</p>

<p><big>Application</big></p>
<p><big>Area monitoring</big></p>
<p>Area monitoring is a common application of WSNs. In area monitoring, the WSN is deployed over a region where some phenomenon is to be monitored. A military example is the use of sensors to detect enemy intrusion; a civilian example is the <a href="page.php?w=Geo-fence">geo-fencing</a> of gas or <a href="page.php?w=oil_pipeline">oil pipeline</a>s.</p>

<p><big>Health care monitoring</big></p>
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