OCCUPANCY SENSORS
What is an Occupancy Sensor?
An occupancy sensor in an HVAC system is a device that identifies the presence of individuals in a room. This allows the HVAC system to modify heating or cooling based on whether the space is occupied. Essentially, it activates the system when people are present and deactivates it when they leave, leading to energy savings.
These sensors utilize technologies such as infrared or ultrasonic waves to detect body heat or movement, thereby prompting the HVAC system to turn on or adjust settings upon someone entering a room. By operating the HVAC system only when necessary, occupancy sensors play a significant role in conserving energy in buildings.
Common Types of Occupancy Sensors Used in the HVAC Industry:
- Passive Infrared (PIR) Sensors: The most widely used type, which detects variations in infrared radiation emitted by people.
- Ultrasonic Sensors: These emit sound waves and detect reflections to sense movement, even through obstacles.
- Dual-Technology Sensors: These combine both PIR and ultrasonic capabilities for enhanced accuracy.
