Temperature sensor : Definition, Different types of temperature sensor , Uses ,Contact temperature sensor and non contact temperature sensors

 Temperature Sensor : 


A temperature sensor is a device that is designed to measures temperature changes in an environment or object. It  detects coldness or heat of an object and then convert it into an electrical signal. The most common unit of temperature is Celsius, Fahrenheit, Kelvin. The S.I unit is kelvin. It has the symbol K.

The principle of a temperature sensor is based on the relationship between temperature and a measurable physical property. Different types of temperature sensors operate on various principles.

Four types of temperature scales are Celsius, Fahrenheit, Kelvin scales.

 Temperature sensors fall into two main categories, depending on the type of application used or the industry you work in.

TYPES :

1. Contact temperature sensors

    It measure the hot or cold level of an object or substance by direct contact. They are used to detect various temperatures in different solids, liquids or gases.

2. Non-contact temperature sensors

    It never come into direct contact with an object or substance and they are mostly used in hazardous environments such as the power plant industry. They measure the heat or coldness of substance through the radiation emitted by the heat source.


Infrared thermometer

An infrared thermometer is a thermometer which infers temperature from of the thermal radiation emitted by the object being measured. They are sometimes called laser thermometers.

Different types of Temperature sensors :

  • Thermometers
  • Thermostats
  • Thermistors
  • Negative temperature coefficient (NTC) thermistors
  • Thermocouples
  • Resistance Temperature Detectors (RTD)
  • Semiconductor-based temperature sensors 
    Temperature plays a crucial role in medical care, food, beverages, and agriculture. Some of the most common uses of thermistors are in digital thermometers, in cars to measure oil and coolant temperatures, and in household appliances such as ovens and refrigerators, but they are also found in almost any application that requires heating or cooling protection circuits for safe operation.

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