Temperature Sensors

What is the primary function of a temperature sensor?

• Convert electrical energy into heat

• Measure humidity levels

• Detect and convert thermal energy into an electrical signal

• Measure light intensity

Which of the following is a non-contact temperature sensor?

• Thermocouple

• RTD (Resistance Temperature Detector)

• Infrared (IR) sensor

• Thermistor

Which temperature sensor type is based on the Seebeck effect?

• Thermocouple

• Thermistor

• Semiconductor sensor

• Silicon PTC sensor

What are the two main categories of thermistors?

• Active and passive thermistors

• Contact and non-contact thermistors

• NTC and PTC thermistors

• Silicon and ceramic thermistors

Which scientist first noted the temperature dependence of metal resistance?

• Nikola Tesla

• Sir Humphry Davy

• Albert Einstein

• London, UKJames Clerk Maxwell

What is the main characteristic of a Positive Temperature Coefficient (PTC) thermistor?

• Resistance decreases as temperature increases

• Resistance remains constant with temperature changes

• Resistance increases as temperature increases

• It is not affected by temperature

What material is commonly used in high-temperature RTDs (above 600°C)?

• Copper

• Tungsten

• Silicon

• Aluminum

What is the primary advantage of the Steinhart-Hart model for thermistors?

• Requires only one calibration point

• Provides high accuracy over a broad temperature range

• Simplifies temperature measurement circuitry

• Works only with PTC thermistors

Which component is required for accurate temperature sensor calibration?

• Digital multimeter

• International Temperature Scale (ITS-90) reference

• Thermowell

• Thermistor model

What type of temperature sensor typically uses the pn-junction principle?

• RTD

• Thermocouple

• Thermistor

• Semiconductor sensor