Sensors
| Microsoft Kinect Sensor The Kinect sensor bar contains 3D depth sensors, a colour camera and a microphone array. These are used, in conjunction with an XBox 360 or Windows OS, for motion sensing and voice control. |  |
| Air-Fuel Ratio Meter These sensors are used in internal combustion engines to determine how much oxygen is being output by the engine. This indicates whether all the oxygen is being used up and whether there is a malfunction in the engine. It can be used to optimise the fuel efficiency of an engine. |  |
| UAV UAVs contain many kinds of sensors such as biological sensors which can detect the presence of various microorganisms in the air and other biological factors. As well as biological sensors UAVs contain electromagnetic spectrum sensors which can detect visible light and infrared or near infrared as well as radar systems. |  |
Digital or Analogue
One final note is how it's interesting that yes, modern digital systems can often offer you more flexibility and options, but sometimes you are more concerned with reliability, and/or precision, and analogue systems may still be better.
In terms of reliability, some analogue systems work based on unalterable physical principles, and are made of hardy pieces, so are less prone to malfunction or breakage. And in terms of precision, recall that digital systems ultimately measure discrete values, whereas analogue readings and variations are theoretically infinite.