What is the best type of occupancy sensor for an office where occupants sit quietly for long periods?

In an office environment where occupants tend to sit quietly for extended periods, an infrared sensor is particularly advantageous because it detects motion based on changes in heat emitted by objects within its range. This type of sensor is effective in spaces where the movement is minimal, as it can pick up on the body heat of individuals even when they are not making significant movements.

Though passive infrared sensors specifically refer to systems that only detect infrared radiation changes (like a human body versus the background), the term "infrared sensor" can encompass various systems that utilize infrared technology, making it appropriate for this scenario. This ability to sense heat ensures that even with minimal movement, the sensor can respond to the presence of individuals, turning the lights on and off as needed, promoting energy efficiency without inconveniencing occupants.

In contrast, ultrasonic sensors rely on sound waves and can confuse human presence with ambient noise or movements in the office, which might trigger false activations. Photoelectric sensors are often better suited to detect objects or environmental changes rather than subtle movements of individuals. Passive infrared sensors can also be very effective, but in contexts where the weight of the term "infrared" is broader, focusing on general infrared sensors is more inclusive of diverse technological advancements.

Thus, choosing an infrared