Sensor is a device, module, machine, or subsystem whose purpose is to detect events or changes in its environment and send the information to other electronics, frequently a computer processor. A sensor is always used with other electronics.
Temperature Sensors is a resistance Thermometers are used widely from -200 to +850°C in different process. Especially at low temperature, resistance thermometers are prefered since their accuracy is much better than thermocouples. Up to 400°C standard types and between 400-850°C special types are used.
Humidity sensors also called a hygrometer, measures and regularly reports the relative humidity in the air.
Proximity Sensors have a special specifications such as rapid switching capacity, unlimited number of switching cycles since there are no mechanical contacts, also it can work in harsh conditions more over it is easy to install.
