In order to gain the optimum granularity of people’s movements, we recommend one sensor for every 1000 sq ft or 300 sqm. This equates to a radius from the each sensor of approximately 10 meters.
The maximum range is considerably more than this recommendation. Because the antenna picks up wifi signals from all directions, it’s more useful to express this range as radius from the sensor rather than square meter coverage. In a typical environment, the range is approximately 40m radius indoors, or up to 80-100m radius outdoors. Thick concrete walls, floors and sheet metal will reduce this range significantly. Tented structures, shell scheme walls, MDF and other common materials used at events do not have such a dramatic effect. We always discuss sensor positioning and measurement goals in detail with clients prior to deployment.