- A resistive element which measures electromagnetic radiation by absorbing it and converting it into heat. The increase in its temperature is used to measure the radiant energy. Also called thermal sensor (1), or bolometer.
- An instrument or device, such as a thermal detector (1), which senses heat. Also called thermal sensor (2).
- An instrument or device, such as a thermocouple, which functions or is actuated when exposed to heat.
- An instrument or device, such as a thermometer, which quantifies heat.
- synonymthermal sensor