Which of the following is NOT included in the definition of alarm systems?

The definition of alarm systems commonly encompasses devices specifically designed to detect and alert for hazardous conditions or security breaches. Smoke detectors and carbon monoxide detectors are explicitly included as they are critical safety devices that trigger alarms in response to dangerous situations, such as fire or carbon monoxide presence. Similarly, security equipment encompasses a wide range of systems designed to protect property and occupants from unauthorized access or criminal activity.

Thermostats, on the other hand, are designed to regulate temperature within a space and do not serve a direct function related to security or safety alarm systems. They do not trigger alerts for emergencies in the same way that smoke or carbon monoxide detectors do, making them non-inclusive in the definition of alarm systems. This distinction clarifies why thermostats are the correct choice as not being part of alarm systems.