A sensor is a device that measures a physical quantity and converts it into a signal which can be read by an observer or by an instrument. For example, a mercury thermometer converts the measured temperature into expansion and contraction of a liquid which can be read on a calibrated glass tube. A thermocouple converts temperature to an output voltage which can be read by a voltmeter. For accuracy, all sensors need to be calibrated against known standards.
Phys.org™ (formerly Physorg.com) is a leading web-based science, research and technology news service which covers a full range of topics.
Phys.org is a part of Science X network. With global reach of over 5 million monthly readers and featuring dedicated websites for hard sciences, technology, smedical research and health news, the Science X network is one of the largest online communities for science-minded people.Read more
Identify the news topics you want to see and prioritize an order.
Please, allow us to send you push notifications with new Alerts.