Tesco has installed heat sensors in its supermarkets that can identify in-store bottlenecks as customers move around.
The UK's largest retailer is using the technology to ease congestion at tills and in store aisles. By improving the flow of customers around its stores, Tesco said it was maximising revenue and increasing customer satisfaction.
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Built by UK manufacturer Irisys, the heat sensors have been installed above the doors in the Tesco stores. The same technology is used by the emergency services to locate survivors in collapsed buildings.
Tesco will collect the sensor information in a dedicated in-store customer flow system.