lämpötiladiodis

Lämpötiladiodi, often referred to as a thermistor, is a type of resistor whose resistance is strongly dependent on temperature. The term "lämpötiladiodi" is a Finnish word that translates to "temperature diode" or "temperature resistor." While the term "diode" might suggest a semiconductor junction, in this context, it refers to a component that exhibits a significant change in its electrical properties due to temperature variations.

There are two main types of thermistors: NTC (Negative Temperature Coefficient) and PTC (Positive Temperature Coefficient). In an NTC thermistor, the resistance decreases as the temperature increases. Conversely, in a PTC thermistor, the resistance increases as the temperature increases. This predictable relationship between resistance and temperature makes thermistors useful for temperature measurement and control.

Thermistors are commonly made from ceramic or polymer materials. Their accuracy, cost-effectiveness, and wide operating temperature range make them suitable for various applications. They are found in numerous devices, including digital thermometers, home appliances like ovens and refrigerators, automotive systems for engine temperature monitoring, and industrial control systems. The principle of operation relies on the change in electrical conductivity of the semiconductor material with temperature.