News tagged with sensors

Related topics: robot · solar cells · electronic devices · artificial intelligence · carbon nanotube

Can humans sense the Earth's magnetism?

For migratory birds and sea turtles, the ability to sense the Earth's magnetic field is crucial to navigating the long-distance voyages these animals undertake during migration. Humans, however, are widely assumed not to ...

Jun 21, 2011
popularity0 comments 18

Moving through time

Although we can't technically travel through time (yet), when we think of the past or the future we engage in a sort of mental time travel. This uniquely human ability to psychologically travel through time arguably sets ...

Jan 21, 2010
popularity0 comments 9

Your eyes are half a billion years old

Look after your eyes – they are at least half a billion years old, and a good deal older than your brain. The eyes are one of our most remarkable and precious organs, yet their origins have been shrouded in mystery until ...

Jul 30, 2013
popularity0 comments 5


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.

This text uses material from Wikipedia, licensed under CC BY-SA

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