What Technology shall an Airport Choose for People Counting?

In today’s airport landscape, where passenger experience, operational efficiency, and commercial revenue all intersect, accurate people counting is no longer a “nice-to-have” it’s a must. Airports worldwide are looking for solutions that not only track footfall but also connect the dots between operational data, commercial performance, and real-time decision-making.

Redefining People Counting with Precision and Privacy

Traditional people counting technologies, such as camera-based or infrared systems, often face limitations in coverage, privacy, and accuracy. An alternative approach involves using signal-based detection methods capable of identifying mobile devices even when Wi-Fi is disabled or the device is in airplane mode. When combined with multi-angle triangulation techniques and, where appropriate, LiDAR, this method enables the creation of anonymous and precise movement trajectories within complex environments like airports. With each sensor capable of covering areas up to 700m2 (~7,500 sq ft), this solution offers a scalable and discreet alternative to more intrusive or infrastructure-heavy systems.

More Than Counting: Creating Real Operational Intelligence

Airports using signal based technologies don’t just count people but to understand them. Signal based systems can enable:

• Real-time queue and process time measurements at security, check-in, or boarding areas.

• Forecasting and alerts based on historical patterns.

• Full curb-to-gate passenger trajectories, which help optimize staffing and passenger flow.

• Bus dwell-time monitoring to optimize ground transport operations.

San Diego Airport, for example, enabled accurate monitoring of flight delays simply by observing passenger behaviour at the gate using signal based technology.

Boosting Commercial Revenue by Tracking Dwell Time

Commercial teams benefit tremendously. It has been proven through case studies at Glasgow and San Diego airports that dwell time is 10x more correlated to non-aeronautical revenue than passenger volume. Just one extra minute spent in retail areas can generate $54,000 in additional revenue.

Furthermore, a case study with Sunglass Hut revealed that the physical store at the airport generated twice the profit of its online counterpart, despite identical revenues. Why? Because physical presence means better conversion rates, fewer shipping costs, and stronger margins.

When physical marketing has 8% turn-in-rate (from passersby to visitors ratio) and 40% conversion rate (from visitors to customers ratio), while the online store has 3% click through rate (from Google results to click ratio) and 4% conversion rate (from click to purchase ratio).

As a result, with precise passenger counting we can realize how overrated the online world is, or how underrated the physical world is. Such study would have been impossible without signals based technology.

Close the Loop with Passenger Feedback

Through optional opt-in methods such as QR codes and Wi-Fi consent, signal based technology can enable two-way communication with passengers. This means:

• Push surveys for real-time Net Promoter Score (NPS) feedback.

• Behavioural analytics based on feedback tied to location and experience.

• Real-time marketing campaigns targeting passengers who walked past, but didn’t enter, specific stores.

Ariadne: Compatible, flexible & privacy-proof

Ariadne is such a signal based technology, it works with your existing Wi-Fi infrastructure (Cisco, Aruba, etc.) or can deploy plug-and-play sensors (even battery-powered waterproof cases for outdoor use).

And when it comes to privacy, we’re the only company with a Data Protection Authority confirmation in Bavaria, Germany, stating that our data is truly anonymous—not just GDPR-compliant, but exempt.

Built for Today. Ready for Tomorrow.

Ariadne isn’t just about counting today’s passengers. Our vision is to become the indoor GPS of the future, enabling:

• Autonomous wheelchair routing

• Smart robot cleaning schedules

• AR navigation and wayfinding

• Seamless location sharing between retail and airport ecosystems

Already trusted by major airports like Munich, Glasgow, San Diego, Singapore (Changi), Dallas, Los Angeles, and over 200+ locations globally, Ariadne is not just a sensor platform it's an airport intelligence ecosystem.

If you're designing the airport of the future, start with the right foundation

Whether you're planning a new terminal, optimizing existing space, or simply trying to reduce wait times and improve concession revenue, Ariadne gives you the visibility, data, and tools you need to succeed.