The main parameters to determine the number of sensors for an entrance area are its width, height, and expected traffic.
Entrance areas of stores and shopping centers can usually be divided into three types:
A — narrow ones (≤ 3m or 10ft)
B — wide (4m-7m or 13ft-23ft)
C — extra wide (≥7m or 23 ft)
Let’s take a closer look.
A: narrow entrance areas up to 3m (10ft), often found in small stores or shopping center tenants. One video counter will usually be more than enough for them since the traffic there tends to range between 200-1000 people a day. Installation height 2.5m-5m (8ft-16.4ft).
B: wide entrance areas (4m-7m or 13ft-23ft) with less traffic, often found in smaller shopping centers with the ceiling 3m-4m (10ft-13ft) high. With the expected traffic being no more than 400 people a day, one video counter will easily cover the whole entrance area.
B': wide entrance areas (4m-7m or 13ft-23ft) with bigger footfall, often found in large shopping centers with the expected traffic of more than 400 people a day. To increase the accuracy there it’s recommended to install two video counters as shown below.
C: extra wide entrance areas (≥7m or 23ft) usually found in shopping center entrances. In such cases, we suggest installing video counters every 3m-3.5m (10ft-11.5ft). They are combined into one large area of counting 4m to 70m (13ft-230ft) broad.
As you can see, by using fewer counters but with greater coverage you can save a significant amount of money.