[Video Introduction] What is the mechanism of IEC-compliant temperature measuring resistance thermometers?
What are temperature resistance sensors, Pt100 sensors, and Pt1000 sensors? This explains in an easy-to-understand way what they are and what differences exist between them.
▬ Content of this video ▬▬▬▬▬▬▬▬▬▬▬▬ 0:00 Introduction 0:12 Operating principle of temperature resistance sensors 0:47 Measurement range of platinum temperature resistance sensors 1:21 Temperature resistance sensors: Accuracy and standard measurement range 1:57 Pt100 temperature sensor: Industrial standards 2:10 Pt1000 and Pt25: Special specifications Generally, two types of electrical thermometers, temperature resistance sensors and thermocouples, are used in industrial applications. (The mechanism of thermocouples is explained in this video: In temperature resistance sensors, temperature is measured using a resistance thermometer that measures ohmic values. The "Pt" in Pt100 represents the chemical element platinum, and the 100 indicates the resistance value of the sensor at 0 degrees Celsius. Therefore, the most commonly used measuring resistor, Pt100, means that its electrical resistance is 100Ω (ohms) at 0°C. For special applications, Pt1000 temperature sensors are also used. The change in electrical resistance due to temperature rise and fall conforms to the characteristic curve defined by international standards. Temperature can be measured with very high accuracy based on the measured resistance value.
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basic information
Like conventional dial thermometers, temperature measuring resistance elements also come in various accuracy classes. The more accurately a temperature measuring resistance element is intended to measure, the more limited the allowable measurement range becomes. Similarly, the type of measuring resistor (design) must also be taken into account. Should a thin-film resistor or a wire-wound resistor be used? The temperature measurement range based on the IEC 60751 standard varies depending on the measuring resistor. For example, class B of wire-wound thermometers defines a measurement range from -196 °C to a maximum of 600 °C. Exceeding or falling below this range causes the temperature sensor's measurements to drift, making it impossible to measure with the specified accuracy, resulting in inaccurate measurement results. At the current level of technology, this drift is more pronounced in thin-film sensors than in wire-wound sensors.
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Applications/Examples of results
Mainly for general industrial use, there is a track record of use in various industries such as petrochemicals, semiconductors, automotive, pharmaceuticals, food, and machinery equipment.
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"WIKA" is a global manufacturer of measurement instruments headquartered in Germany. For over 70 years, it has maintained a top-class market share in measurement instruments as a specialized manufacturer in the global market. It is the number one manufacturer in Europe for measurement instruments, including pressure gauges and thermometers, widely used in the manufacturing industry, such as plant equipment, and is among the top manufacturers in the world. Currently, it operates in over 40 countries worldwide and boasts a total workforce of 9,000 employees, making it a global company. The Japanese branch has seen a steady increase in performance and has a track record of transactions with major companies across a wide range of industries, including large heavy industry manufacturers. The brand power and product strength are so high that it is often said, "Measurement instruments are WIKA." With bases in over 40 countries, as Japanese companies become more active in expanding overseas, the demand has also increased, and the company's strength lies in its ability to handle everything, including follow-up after product installation. Because it offers a wide range of products not found in other competitors, it can provide comprehensive solutions to meet customer needs.