What is the primary function of a thermostat?

The primary function of a thermostat is to regulate temperature. A thermostat works by detecting the temperature of its environment and making adjustments as necessary to maintain a desired set point. When the temperature rises above or falls below this set point, the thermostat activates or deactivates heating or cooling systems accordingly. This ability to maintain a consistent temperature is crucial for various applications, including residential heating and cooling, industrial processes, and even specific laboratory conditions.

Other options pertain to different functions: measuring humidity involves an entirely different set of sensors, regulating pressure is related to maintaining the pressure levels in systems like gas pipelines or boilers, and monitoring air quality focuses on detecting pollutants and contaminants in the air. Each of these functions is essential in its context, but they do not encompass the primary role of a thermostat, which is temperature regulation.