Which type of temperature sensor uses semiconductive material?

Which type of temperature sensor uses semiconductive material?

• A. Bimetallic sensor
• B. Thermistor
• C. Thermocouple
• D. Resistance temperature detector

Answer: (B)

The correct choice, which identifies the temperature sensor that utilizes semiconductive material, is the thermistor. Thermistors are temperature-sensitive resistors made from ceramic materials that exhibit changes in resistance in response to temperature variations. The key characteristic of thermistors is their nonlinear resistance-temperature relationship, which makes them particularly sensitive for measuring small changes in temperature. In contrast, bimetallic sensors operate using two different metals that expand at different rates when heated, creating a mechanical movement that can be translated into a temperature reading. Thermocouples consist of two dissimilar metal wires joined at one end, producing a voltage that varies with temperature, relying on the thermoelectric effect rather than semiconductive properties. Resistance temperature detectors (RTDs) use pure metal wire to measure temperature changes through resistance changes, functioning based on metallic properties instead of semiconductive materials.

The correct choice, which identifies the temperature sensor that utilizes semiconductive material, is the thermistor. Thermistors are temperature-sensitive resistors made from ceramic materials that exhibit changes in resistance in response to temperature variations. The key characteristic of thermistors is their nonlinear resistance-temperature relationship, which makes them particularly sensitive for measuring small changes in temperature.

In contrast, bimetallic sensors operate using two different metals that expand at different rates when heated, creating a mechanical movement that can be translated into a temperature reading. Thermocouples consist of two dissimilar metal wires joined at one end, producing a voltage that varies with temperature, relying on the thermoelectric effect rather than semiconductive properties. Resistance temperature detectors (RTDs) use pure metal wire to measure temperature changes through resistance changes, functioning based on metallic properties instead of semiconductive materials.