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sachinl
Resistenece Temperature detector reponse time limit ? is any time frame is there ? i.e after 5 years its reponse get slow ?
A Resistance Temperature Detector, or RTD, is a type of temperature sensor that works on the principle of changes in electrical resistance as a function of temperature. It is commonly used in industrial and scientific applications for precise and accurate temperature measurements.
An RTD consists of a metal wire or film made of a material with a high temperature coefficient of resistance, such as platinum, nickel, or copper. As the temperature changes, the electrical resistance of the wire changes as well. This change in resistance is then measured and converted into a temperature reading.
RTDs offer several advantages, including high accuracy, stability, and repeatability. They also have a wide temperature range and can be used in various environments, including extreme temperatures and harsh conditions. Additionally, RTDs do not require any external power source, making them easy to use and maintain.
The most common types of RTDs are the thin-film, wire-wound, and coiled element. Thin-film RTDs have a thin layer of metal deposited on a ceramic substrate, while wire-wound RTDs consist of a wire wound around a ceramic or glass core. Coiled element RTDs have a coil of wire enclosed in a ceramic or glass tube. Each type has its own advantages and is suitable for different applications.
To calibrate an RTD, the sensor is exposed to a known temperature source, and the resistance is measured. This value is then compared to the expected resistance at that temperature, and any deviation is noted. The calibration process can be repeated at different temperatures to ensure accuracy and adjust the sensor if needed.