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Temperature Sensors - RTD (Resistance Temperature Detector)

RTDs, or Resistance Temperature Detectors, are sensors that are used to measure temperatures of various different substances. In a nutshell, a RTD works by using the fact that resistance is inversely proportional to temperature. Thus, a RTD has a specific resistance at a given temperature, and this value is used to calculate the temperature of the substance that it is sensing.

RTDs are useful in a variety of applications and can be used to measure temperatures in a range of different environments. In general, they are used to measure temperatures in closed systems, such as process control systems, or in open systems, such as industrial boilers or hot water systems. They can also be used to monitor temperatures in dangerous environments, such as extreme temperatures in hazardous locations, or to measure the temperature inside industrial machineries.

RTDs are commonly used in industrial application fields due to their accurate and reliable readings. Moreover, they can be easily calibrated and their readings can be easily digitised and recorded. RTDs come in a variety different shapes and sizes and can be used in a range of different applications. The most common type of RTD is a Pt100, which has a resistance of 100 ohms at 0°C (32°F).

The working principle of an RTD is fairly simple. When a current is passed through the RTD, the resulting electric field across it causes electrons within the resistance material to vibrate. The vibration of the electrons causes friction, and as a result, heat is generated. This heat causes a rise in temperature, which in turn causes a change in resistance. This change in resistance can then be measured and used to calculate the temperature of the given substance.

RTDs are commonly used in many different areas and are accurate and reliable means of measuring temperature. They provide accurate readings even at extreme temperatures and are also relatively easy to install and integrate into existing systems. Furthermore, they can be easily calibrated and digitalised, and the data can be easily stored and accessed.

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