How the O3 Senses the Number of People in a Space

Occupant estimation uses onboard sensors and machine learning to estimate the number of people in a space. Currently, the occupant estimate is typically within ±2 of the true number of occupants in the space. This feature does not require an internet connection; occupant data can be viewed if the device is offline.

The occupant estimation feature requires the following: 

• Meeting rooms up to 20x20 ft
• Ceiling heights that range from 8–12 ft
• Centrally mounted device above the occupant space
• No visual obstructions that would block the O3's field of view

Any deviation from the above may produce erroneous or inaccurate data.

The sensor produces an occupancy estimate every 5 minutes.

When occupants enter or leave the space, depending on how much motion there is, there could be a momentary spike in the estimated occupancy due to the increased activity as compared to a normal activity during a meeting. If a momentary spike occurs, it will diminish shortly and settle back closer to the true number of occupants within a few minutes.

See O3 White Papers for details on the measurement method.