Temperature detectors are devices used to measure temperature in various environments. They can be found in everyday items like thermometers and in industrial applications, ensuring processes operate within safe temperature ranges. Common types include thermocouples, thermistors, and infrared sensors, each suited for different temperature ranges and accuracy levels. These detectors work by converting temperature changes into electrical signals, which can then be read and interpreted. They play a crucial role in many fields, including HVAC systems, food safety, and medical equipment, helping to maintain optimal conditions and prevent overheating or freezing.