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Wondering what a thermocouple is? A thermocouple is a temperature sensor that generates a voltage signal based on the temperature difference between two different metals or alloys. It consists of two dissimilar metal wires joined together at one end, forming a junction. When this junction is exposed to a temperature gradient, it produces a small voltage (which is known as the measuring junction) that is proportional to the temperature difference. You can read more about these sensors in our bespoke <a href="https://docs.rs-online.com/96d5/0900766b815e5302.pdf" target="_blank">Thermocouples</a> <a href="/web/content/discovery/ideas-and-advice/thermocouples-guide"> selection guide</a>. This phenomenon is known as the Seebeck effect. It occurs because different metals have different electron configurations, resulting in varying electron densities and thermal conductivities. As a result, when the junction is exposed to a temperature difference, an electric current is induced due to the flow of electrons from the hotter metal to the colder metal.The voltage produced by the thermocouple can be read and measured by a voltmeter or a specialized temperature measurement device. By knowing the relationship between the temperature and the voltage output, typically described in a calibration table or equation specific to the type of thermocouple being used, the temperature at the measurement point can be determined.Types of thermocouplesThere are a wide range of thermocouple types available, each with different characteristics such as temperature range and their robustness. Each thermocouple is defined by a letter such as K-Type. Common thermocouple types also include: Type J, Type K, Type L and Type TThe letters refer to the type of materials used which indicates what temperature they are usable at. For example, J-Type is iron and copper-nickel and is useable from around 0°C to 816°C, depending on other characteristics. Some thermocouples come with an additional sheath that insulate the wires to prolong their life.Thermocouples are widely used in various industries for temperature monitoring and control applications. They are ideal tools for the measurement of high temperatures and are a popular choice as they are so robust, reliable and an affordable solution.What are Thermocouples used for?They can be used in many applications, both domestic and industrial. Some examples include:<ul><li>Thermostats</li><li>Hospitals</li><li>Thermometers</li><li>Vehicle Diagnostics</li><li>Boilers and Heating</li><li>Sensors</li><li>Oven Safety Features</li><li>Food Thermometers</li></ul>Browse the broad range of Thermocouples RS has to offer and order today with next day delivery options available.

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Thermocouples | Temperature Sensors | RS

Thermocouples

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Thermocouples | J type thermocouple | RS

J type thermocouples are used in a wide range of industrial and commercial applications. J type thermocouples are one of the most common types of Thermocouple used in industry today. They are a popular choice as they last longer, function better, and are incredibly accurate. RS offer an extensive selection of high-quality J type thermocouples from industry-leading brands including Correge, Electrotherm, Gefram, Jumo, Omron, and of course, RS PRO.<h2>How does a J type thermocouple work? </h2>All Thermocouple types work in a similar way. They have two wires made of different metals which are fixed together, forming a junction which creates a temperature change. J type thermocouples are beneficial as they are simple, versatile and have a wide temperature range. They also possess some key features including<ul><li>Extremely long life</li><li>High efficiency</li><li>Low power requirements</li><li>Easy to install and maintain</li><li>Safe and convenient</li></ul>Browse the broad range of J type thermocouples RS have to offer and order today for next day delivery

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Thermocouples | T type thermocouple | RS

T type thermocouples are used in a wide range of industrial and commercial applications. T type thermocouples are one of the most common types of Thermocouple used in industry today. They are a popular choice as they last longer, function better, and are incredibly accurate. RS offer an extensive selection of high-quality T type thermocouples from industry-leading brand RS PRO.<h2>How does a T type thermocouple work? </h2>All Thermocouple types work in a similar way. They have two wires made of different metals which are fixed together, forming a junction which creates a temperature change. T type thermocouples are beneficial as they are simple, versatile and have a wide temperature range. They also possess some key features including<ul><li>Extremely long life</li><li>High efficiency</li><li>Low power requirements</li><li>Easy to install and maintain</li><li>Safe and convenient</li></ul>Browse the broad range of T type thermocouples RS have to offer and order today for next day delivery

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Thermocouples | Thermal couples | RS

Thermal couples are used in a wide range of industrial and commercial applications. Thermal couples are commonly used in industrial applications and are a popular choice as they last longer, function better, and are incredibly accurate. RS offer an extensive selection of high-quality Thermal couples from industry-leading brand RS PRO.<h2>How does a Thermal couple work? </h2>All Thermocouple types work in a similar way. They have two wires made of different metals which are fixed together, forming a junction which creates a temperature change. Thermal couples are beneficial as they are simple, versatile and have a wide temperature range. They also possess some key features including<ul><li>Extremely long life</li><li>High efficiency</li><li>Low power requirements</li><li>Easy to install and maintain</li><li>Safe and convenient</li></ul>Browse the broad range of Thermal couples RS have to offer and order today for next day delivery

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J Type Thermocouples | RS

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N Type Thermocouple | RS

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Correge Thermocouples | RS

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Sensors Thermocouples | RS

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K type thermocouple probe | RS

K type thermocouple probes are used in a wide range of industrial and commercial applications. K type thermocouple probes are one of the most common types of Thermocouple used in industry today. They are a popular choice as they last longer, function better, and are incredibly accurate. RS offer an extensive selection of high-quality K type thermocouple probes from industry-leading brands including Correge, Electrotherm, Jumo, Reckmann, Turck, and of course, RS PRO.<h2>How does a K type thermocouple probe work? </h2>All Thermocouple types work in a similar way. They have two wires made of different metals which are fixed together, forming a junction which creates a temperature change. K type thermocouple probes are beneficial as they are simple, versatile and have a wide temperature range. They also possess some key features including<ul><li>Extremely long life</li><li>High efficiency</li><li>Low power requirements</li><li>Easy to install and maintain</li><li>Safe and convenient</li></ul>Browse the broad range of K type thermocouple probes RS have to offer and order today for next day delivery

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K type thermocouple range | RS

K type thermocouple ranges are used in a wide range of industrial and commercial applications. K type thermocouple ranges are one of the most common types of Thermocouple used in industry today. They are a popular choice as they last longer, function better, and are incredibly accurate. RS offer an extensive selection of high-quality K type thermocouple ranges from industry-leading brands including Correge, Electrotherm, Jumo, Reckmann, Turck, and of course, RS PRO.<h2>How do K type thermocouple ranges work? </h2>All Thermocouple types work in a similar way. They have two wires made of different metals which are fixed together, forming a junction which creates a temperature change. K type thermocouple ranges are beneficial as they are simple, versatile and have a wide temperature range. They also possess some key features including<ul><li>Extremely long life</li><li>High efficiency</li><li>Low power requirements</li><li>Easy to install and maintain</li><li>Safe and convenient</li></ul>Browse the broad range of K type thermocouple ranges RS have to offer and order today for next day delivery

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Thermocouple Sensor | RS

Thermocouple Sensors are used in a wide range of industrial and commercial applications. Thermocouple Sensors are commonly used in industrial applications and are a popular choice as they last longer, function better, and are incredibly accurate. RS offer an extensive selection of high-quality Thermocouple Sensors from industry-leading brand RS PRO.<h2>How does a Thermocouple Sensors work? </h2>All Thermocouple types work in a similar way. They have two wires made of different metals which are fixed together, forming a junction which creates a temperature change. Thermocouple Sensors are beneficial as they are simple, versatile and have a wide temperature range. They also possess some key features including<ul><li>Extremely long life</li><li>High efficiency</li><li>Low power requirements</li><li>Easy to install and maintain</li><li>Safe and convenient</li></ul>Browse the broad range of Thermocouple Sensors RS have to offer and order today for next day delivery

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K Type Thermocouples| Thermocouples |RS

A K-type thermocouple is a type of temperature sensor used for measuring temperature in various industrial and scientific applications. It is one of the most used thermocouple types due to its wide temperature range, accuracy, and durability.<h2>What is a K Type Thermocouple?</h2>The K-type thermocouple consists of two different metal wires, usually made of chromel and alumel. These two wires are joined at one end to form the sensing junction, while the other ends are connected to a measurement instrument or control system.The principle behind the operation of a thermocouple is based on the Seebeck effect, which states that when two dissimilar metals are connected at two different temperatures, a voltage is generated across the junction proportional to the temperature difference. The K-type thermocouple utilizes the voltage generated by the temperature gradient between the sensing junction and the reference junction to measure temperature.<h2>Why Use a K Type Thermocouple?</h2>K-type thermocouples can operate over a wide temperature range. They have good accuracy and stability, making them suitable for a variety of applications in industries such as manufacturing, heating, and cooling systems, food processing, and scientific research.To measure temperature using a K-type thermocouple, a thermocouple thermometer or a data acquisition system is typically used to measure the voltage across the thermocouple and convert it into temperature readings. The voltage output is nonlinear, so conversion tables or equations are used to accurately determine the temperature based on the voltage measurement.While K-type thermocouples are versatile and widely used, their accuracy may vary depending on factors such as the quality of the wires and the measurement equipment used. Calibrating the thermocouple periodically against a known temperature reference is recommended to ensure accurate temperature measurements.

J Type Thermocouples

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