Two Ways to Measure Temperature Using （使用两种方法来测量温度）.pdf

Two Ways to Measure Temperature Why Use a Thermocouple? Advantages Using Thermocouples Feature 鈥emperature range: Most practical temperature ranges, from cryogenics to jet-engine exhaust, can be served using Simplicity, Accuracy, and Flexibility thermocouples. Depending on the metal wires used, a thermocouple is capable of measuring temperature in the range By Matthew Duff and Joseph Towey 鈥?00掳C to +2500掳C. Introduction 鈥obust: Thermocouples are rugged devices that are immune to shock and vibration and are suitable for use in hazardous The thermocouple is a simple, widely used component for environments. measuring temperature. This article provides a basic overview of thermocouples, describes common challenges encountered 鈥apid response: Because they are small and have low thermal when designing with them, and suggests two signal conditioning capacity, thermocouples respond rapidly to temperature solutions. The first solution combines both reference-junction changes, especially if the sensing junction is exposed. They compensation and signal conditioning in a single analog IC for can respond to rap