Thermostatic devices are tools used to control temperature in various systems, ensuring that environments remain comfortable or that processes operate efficiently. Common examples include thermostats in homes, which regulate heating and cooling systems, and thermostatic valves in plumbing, which manage water temperature. These devices work by sensing temperature changes and adjusting the system accordingly. For instance, when a room gets too warm, a thermostat can signal the air conditioning to turn on, helping to maintain a desired temperature. This automatic regulation helps save energy and enhances comfort in living and working spaces.