What is a common application of infrared sensors?

Infrared sensors are commonly used for detecting occupancy in building systems due to their ability to sense heat and motion. These sensors operate by detecting infrared radiation emitted from objects, particularly human bodies. When someone enters a room, the infrared sensor picks up the emitted heat and sends a signal to the building management system to adjust lighting, HVAC, or security systems accordingly. This capability not only enhances energy efficiency by ensuring that resources are only utilized when needed but also contributes to improved comfort and security within the space.

In contrast, measuring temperature typically involves thermocouples or thermistors, which are designed specifically for that purpose. Controlling humidity levels is usually performed by hygrometers or humidistats that directly measure moisture in the air. Monitoring air quality often relies on various types of sensors that detect particulate matter, gases, or volatile organic compounds, distinguishing them from infrared technology focused on heat detection.