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Different Types of Sensors
Wednesday, September 26, 2018

The embedded systems we know today are very much reliant on sensors. Whether it is your home’s security system or your school’s fire alarm, you can surely find sensors in there. Nowadays, they are also widely used to predict weather conditions by measuring changes in humidity, pressure and temperature.

Sensor is a chip that sends feedback to the microcontroller after it observes certain changes. To properly operate a sensor you need to provide grounding and a power supply. Sensors are classified into two categories: analog and digital. In this article, we will list down the different types of sensors and their uses.

Types of Sensors

sensor  Photodiode (Light Sensor)

You might have seen students using this type of sensor in their projects. It is mostly used as an IR receiver as it detects light rays. Although it is constructed like a normal PN junction diode, it works differently.

The street lamps, which automatically glow when sunlight intensity decreases, use a photodiode to detect the amount of light. You can make such a project. However, you need to know that even very little light will make the photodiode work.

Digital Pressure Sensors

A digital pressure sensor has an analog to digital converter unit inside which converts the analog signals to a digital output.
There are several applications of pressure sensors:
  • Measuring water level
  • Inhalers
  • Drones
  • Monitoring airflow
  • Medical instruments
  • Industrial processes
  • Monitoring tyre pressure
  • Radiosonde
  • Detecting leaks in gas pipes
Weight Sensor

Like a pressure sensor, load cells (weight sensor) give an electrical signal output after measuring a physical quantity like force. When force is applied, the structure of the load cells varies due to a resistance change. A Wheatstone bridge is used to calibrate the value that is produced by load cells.

Temperature Sensors

As the name suggests, these sensors measure the temperature by measuring the changes in resistance. Resistance temperature detectors (RTDs) are reliable, accurate and stable. Temperature sensors are used in industries, air conditioning systems, automobiles, mobile phones, computers, laptops, tablets etc.

Position Sensors

A position sensor (Hall Effect sensor) gives the output voltage after sensing the magnetic field. Output voltage increases when the magnetic field is positive.

Some applications of position sensors are:
  • Controlling motors
  • Metal detector
  • Magnetic code decoder
  • Speed movement detection
  • Current sensing
  • GPS positioning
Where to Buy Sensors?

You need to purchase a sensor from an authentic company which provides reliable products. You should make sure you know which type of sensor you really need. If you are looking to buy a sensor, then Rilco Industrial Controls is the place for you. Rilco works with trusted manufacturers to provide their customers with a wide variety of sensors.



 
 
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