Sensors (Analogue & Digital)

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  • Created by: Sarah
  • Created on: 06-02-13 07:59

Sensors (Analogue and digital)

There are many bodily measurements that need to be frequently recorded about a patient in hospital.

These recordings can be performed by a sensor.

Sensors are devices that detect physical, chemical and biological signals. They are measured and then processed using a computer.

Examples of where sensors are used are to monitor your temperature, blood pressure, pulse, heart rate etc.

There are two different types of sensors, analogue and digital.

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Analogue sensors

Analogue sensors are used to measure analogue quantity, this means the measurements can have a wide range of values e.g. temperature, pressure, or be on a continuous scale. If an analogue sensor is connected to the computer the signals produced must be converted into a digital signal because computers work better with processing and storing digital signals.

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Digital sensors

Digital sensors can detect digital quantities. For example a switch can only turn on and off meaning they only have two positions and therefore represented as a digital quantity.

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