What is a temperature sensor?
What is a temperature sensor?
To measure the temperature, special sensors are used, which are known as temperature sensors.
Temperature sensors are simple instruments that measure the degree of heat or coolness and convert it into a readable unit.
A temperature sensor is a device, typically a thermocouple or a resistance temperature detector that provides a readable temperature measurement via an electrical signal.
Types of temperature sensors:
Temperature sensors come in many different types, shapes and sizes. They have two main types:
1- Contact type temperature sensors:
There are several thermometers that measure the temperature or coolness of a fluid by direct contact. Such temperature sensors are placed in the contact type group. They can be used to detect solids, fluids or gases over a wide range of temperatures.
2- Non-contact temperature sensors:
These types of thermometers are not in direct contact with the fluid, they measure the temperature or coolness through the radiation emitted from the heat source.
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What is a resistance temperature sensor or RTD?
RTD sensor or Resistance Temperature Detector is an instrument used to measure temperature. Resistance Temperature Detector is called resistance temperature sensor and this sensor is also called a resistance thermometer.
What is a thermocouple?
Thermocouples are one of the most common sensors in temperature measurement which are very popular in the industry due to their simplicity of operation and ease of use and broad range of measurement.
Thermocouples are thermoelectric or thermoelectric sensors that basically consist of two points of connection of dissimilar metals, such as copper and Constantan alloy, which are welded or wrapped together at two points.
Temperature sensor applications
The application of a thermometer depends on the diode voltage. The temperature change is directly proportional to the diode resistance. The colder the temperature, the lower the resistance and vice versa.
The resistance is measured across the diode and converted into a readable unit of temperature (Fahrenheit, Celsius, etc.) and displayed in a variety of units.
Temperature sensors are used to measure the internal temperature of structures such as bridges, dams, buildings, power plants, etc.
The following items can be mentioned as part of the temperature sensors applications:
1- To measure temperatures that are higher than the functional range of thermocouples
2- In environments where thermocouples are contaminated or there are restrictions on their use
3- To measure the temperature of moving targets.
4- To measure the temperature of targets that are not easily accessible (such as inside furnaces)
5- To measure the temperature of targets that are damaged in contact with thermocouples or resistance thermometers.
6- To measure the average temperature of large containers.
7- To measure and reveal the change in the temperature of a location that must have a constant or certain temperature (troubleshooting)
