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Temperature sensors are generally available both digital and analog type. Analog type temperature sensors can measure ambient temperature. These sensors use a solid-state technique to determine the temperature. These type temperature sensors do not use mercury, thermistors or bimetallic strips; instead, they use the plain and simple mechanism that as the temperature increases the voltage across a diode increases at a known rate. By amplifying the change in voltage, it is easy to generate an analog signal that is directly proportional temperature. Although, there have been several improvements after this technique to measure the temperature.

Temperature sensors do not require any calibration as the other sensors. They are free from all those wear and tear, they are precise and work under diverse environmental conditions and they are consistent between sensors and reading, since these temperature sensors don’t have any moving parts. They are very easy to use and cost effective. It’s really very user friendly, as you just need to connect temperature sensors to the power outlet the right pin and left pin to the ground, then the middle pin, directly proportional to the temperature, will have an analog voltage. With this analog voltage, power supply does not have anything to do.