What is sensor || Types of sensor

What is Sensor? 

The sensor is electronics components, which can detect any movement quickly; we can do any work automatically by sensors.

The sensor used at houses, cars, factories, and also robotics used sensor for do work, same like human body has sensors, such as Eyes, Ear, Nose, Hand, and Tongue, same robotics used different types of sensor.

We have many types of sensor now we will discuss about some important sensor which is following.

1-    Metal sensor

Metal detector sensor is the electronics component it detects the nearby metal, metal sensor is very useful for finding metal hidden within object, such as when any metallic things will come near to it, then it will pass a signal the electronics circuit and circuit will perform work.

2-    LDR sensor

The Light Dependent Resistor is an electronics component it used for light sense, basically it is a Resistor it resistance will change by Lightning effect, such as its resistance will increase in darkness and decrease in light, the LDR also called photo resistor, it’s made by high resistance semiconductor.

3-    IR sensor

In the IR Sensor has two LEDs one is Transmitter and other is receiver, basically it works by light, because Transmitter "LED" will out Infrad light, then this light will sense the receiver "LED", and give output signal, then it's signal will read electronic circuit and circuit perform any work.

4-    Proximity sensor

The work of proximity sensor is same of Metal sensor and also its looks like metal sensor, but it can detect to the any objects without any physical contact, such as plastic, rubber, glass, etc.

When the metal sensor sense only metallic things, the proximity sensor used is cars which give benefit in car parking, when it detect any object nearby it will pass a signal, which inform that any object have near car, and it also used in machines which used in factories for packaging.

5-    PiR sensor

The PiR sensor means Passive Infrared sensor, its an electronic sensor which used to measures infrared light radiating from any objects, It also known by Motion sensor.

The basically PIR sensor can detect human body, which radiation out from human body it sense it and pas a signal to electronics circuit, it used for Home automatic Lights and also it used for security, because when anybody will come around it, then it can detect quickly.

For this it used for lights automatic "ON" "OFF" when any human will Enter in room then lights will automatically "ON".

6-    Thermistor sensor

The Thermistor sensor also known by temperature and heat sensor, its looks like a electronics component, basically it is variable resistor but its resistance will change by temperature.

For this it used for temperature measurements and in which equipment which have need to sense temperature, such as Air conditioners or inverter, stabilizer, etc.

When it sense heat then it will change resistance and pass a signal to electronics circuit then electronics circuit will perform works, you Know that Air conditioners automatic "ON" "OFF" by temperature, this work done by thermistor sensor. 

   7- Pressure Sensor

A pressure sensor can gauge the strain in gases or fluids, it can strain sensor comprises of a tension delicate component which can decide the strain being applied and parts to change over the data into a result signal.