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Sensor

From Academic Kids

A sensor is a technological device or biological organ that detects, or senses, a signal or physical condition and chemical compounds.

A sensor should not be confused with the following orthographically distinct items:

  • censor, a person who decides what can be published
  • censor, an ancient Roman political office
  • censer, a utensil for incense
Contents

Artificial sensors

Most sensors are electrical or electronic, although other types exist. A sensor is a type of transducer. Sensors are either direct indicating (e.g. a mercury thermometer or electrical meter) or are paired with an indicator (perhaps indirectly through an analog to digital converter, a computer and a display) so that the value sensed becomes human readable. Aside from other applications, sensors are heavily used in medicine, industry and robotics.

Since a signal is a form of energy, sensors can be classified according to the type of energy they detect. For example:

Biological sensors

All living organisms contain biological sensors with functions similar to those of the mechanical devices described. Most of these are specialized cells that are sensitive to:

The human senses are examples of specialized neuronal sensors. See Sense.

See also

Links

de:Sensor fr:Capteur it:Sensore nl:Sensor ja:センサ pl:Czujnik fi:Anturi zh:传感器

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