Types of Temperature Sensors | Thermocouple | RTD | Thermistor | Radiation Sensor

This video gives an explanation about four Common Types of Temperature sensors as Thermocouple, Resistant Temperature Detector, Thermistor, and Radiation Sensor. How do temperature sensors work? Learn the basics of how different temperature sensors work.
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The temperature sensor is an electronic device that measures temperature of its environment and converts the input data into electronic data to record, monitor, or signal temperature changes.

Technical Videos :

RTD ( Resistant Temperature Detector ):
It is Temperature Sensor that measures the temperature using the principle that the
resistance of metal changes with temperature.
In other words, electrical resistance of certain metals increases and decreases in a predictable manner as the temperature increases or decreases.
Commonly used metals for RTDs are Platinum, Copper, and Nickel.

What is PT100, PT500, PT1000?
They are all types of RTD (Resistance Temperature Detector) sensors that are made from Platinum.
The Pt100 sensor has a resistance of 100 ohms at 0°C and is by far the most common type of RTD sensor.
The Pt500 sensor has a resistance of 500 ohms at 0°C and the Pt1000 has 1000 ohms resistance at 0°C.

RTDs are usually selected over thermocouples because of their inherent stability.
Another advantages over thermocouples is that no special compensating lead wire or cold junction compensation is needed.

Thermistors:
A typical thermistor has a negative temperature coefficient.

Radiation sensor:
It can measure temperature up to 3500 Celsius without contact with the measured medium.

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