A HVAC sensor is a device that is used to measure and monitor the temperature, humidity, and other environmental conditions in a home or building. It is an important component of any HVAC system, as it helps to ensure that the air quality and temperature remain at comfortable levels. HVAC sensors are typically placed in areas such as bedrooms, living rooms, and basements, and they can be wired or wireless. They measure the temperature, humidity, and other environmental conditions, and then send this information to the HVAC system, which then adjusts the settings accordingly. This helps to maintain a comfortable environment for occupants and can also help to reduce energy costs. HVAC sensors are an essential part of any HVAC system, and they are a great way to ensure that the air quality and temperature remain at comfortable levels.