Temperature Sensor || Type, Application And Advantage Of Temperature Sensor.

Summary

In this Vitas Communication tutorial, we explore the world of temperature sensors, crucial for measuring heat or coldness across various applications like medical research and electronics. We delve into different types, including contact (thermometers, thermocouples, thermistors, RTDs, and semiconductor sensors) and non-contact (infrared sensors), each with unique operating parameters. Learn about their applications in electric models, HVAC systems, and renewable energy, along with their advantages in controlling temperatures and preventing overheating, ensuring safety and efficiency.

Takeaways

• 🌡️ Temperature sensors are crucial for measuring the degree of hotness or coldness of a body and are used across various applications.
• 🔌 There are two main types of temperature sensors: contact and non-contact, each with specific operating parameters and varieties.
• 💡 Contact temperature sensors require direct contact with the object and include thermistors, thermocouples, thermometers, RTDs, and semiconductor sensors.
• 🌡️ Thermometers are basic contact sensors that measure temperature through the expansion of liquid within a calibrated glass tube.
• ⚡️ Thermocouples are made by joining two dissimilar metals and produce a temperature-dependent voltage due to the thermoelectric effect.
• 📉 Thermistors exhibit a change in resistance with temperature changes, with NTC and PTC types indicating resistance decrease or increase with temperature, respectively.
• 🔩 RTDs (Resistance Temperature Detectors) offer high accuracy, with resistance directly proportional to temperature, and are made from metals like platinum and nickel.
• 🌐 Semiconductor sensors, or IC temperature sensors, offer high linearity and accuracy and are available in various output types like current, voltage, resistance, diode, and digital.
• 👀 Non-contact temperature sensors, such as infrared sensors, detect temperature without touching the object by sensing infrared radiation.
• 🏢 Temperature sensors have wide applications in electric models, HVAC systems, renewable energy, rubber and plastic industry, and biomedical applications.
• 🎯 The advantages of using temperature sensors include easy control of various temperatures in motors, electric cables, engine oils, room conditions, and water heaters, leading to energy efficiency and safety.

Q & A

What are the primary applications of temperature sensors?

Temperature sensors are used in a variety of applications including medical research, labs, electrical or electronic components, and controlling equipment in various industries.

What are the different types of temperature scales on which temperature is measured?

Temperature is measured on scales such as Fahrenheit, Celsius, or Kelvin.

What is the function of a temperature sensor?

A temperature sensor is an electronic device that measures temperature and converts it into a signal.

What are the two main categories of temperature sensors discussed in the script?

The two main categories of temperature sensors discussed are contact temperature sensors and non-contact temperature sensors.

What is a thermometer and how does it measure temperature?

A thermometer is a basic type of contact temperature sensor that measures the temperature of a solid, liquid, or gas. It contains a liquid inside a glass tube that expands when heated, and a calibrated scale is used to indicate the temperature.

How does a thermocouple work and what are its classifications?

A thermocouple works by joining two dissimilar metals to produce a temperature-dependent voltage due to the thermoelectric effect. It is classified into types like K, J, T, E, B, R, S, and N based on temperature ranges, durability, and resistance values.

What is a thermistor and how does it respond to temperature changes?

A thermistor is a temperature sensor that shows a change in resistance due to a change in temperature. It is made from materials like ceramic and polymers and comes in two types: NTC (negative temperature coefficient) where resistance decreases with increasing temperature, and PTC (positive temperature coefficient) where resistance increases with increasing temperature.

What is an RTD and what is its range of measurement?

An RTD (Resistance Temperature Detector) is one of the most accurate sensors where resistance is directly proportional to temperature. It is made from metals like platinum, nickel, and copper and can measure temperatures from -270°C to 850°C.

What are the different types of outputs for semiconductor sensors?

Semiconductor sensors, also known as IC temperature sensors, are classified into five types: current output, voltage output, resistance output, diode output, and digital output temperature sensors.

How do non-contact temperature sensors work and what are their classifications?

Non-contact temperature sensors work by sensing characteristics of the surrounding environment by either emitting or detecting infrared radiation without requiring contact with the object. They are classified into thermal infrared sensors and quantum infrared sensors.

What are some advantages of using temperature sensors?

Using temperature sensors allows for easy control of motor temperature, prevention of overheating in electric cables, automatic control of room temperature and humidity, and monitoring of water temperature for energy efficiency. They also have applications in renewable energy and various industries.