Heat sensors are devices that detect temperature changes in their environment. They can be used in various applications, such as monitoring the temperature in homes, industrial settings, or even in electronic devices. These sensors work by measuring the infrared radiation emitted by objects, allowing them to determine how hot or cold something is. There are different types of heat sensors, including thermocouples, thermistors, and infrared sensors. Each type has its own method of operation and is suited for specific tasks. For example, infrared sensors can detect heat from a distance, making them useful for security systems and energy audits.