Privacy by Design: In-Store Millimeter Wave Sensors

By Björn Sjölund

In a time when privacy concerns drive consumer trust and regulatory standards reshape operational priorities, the retail sector is experiencing a significant transformation. At Walkbase, we believe privacy and data-driven innovation can coexist. Our latest white paper, “Retail Privacy Concerns: From Customer Data to In-Store Sensors”, explores how our exclusive millimeter wave sensors empower retailers to meet privacy demands while delivering the data analytics critical for success in modern retail.

The Consumer Privacy Challenge

The widespread adoption of in-store cameras and sensor technologies that capture sensitive information about shopper activity has raised serious concerns about consumer privacy. Shoppers are increasingly aware of how their data is collected and used, with high-profile breaches and surveillance scandals further intensifying these fears. DataGrail’s 2024 report highlights a 246% rise in consumer data subject requests between 2021 and 2023, emphasizing the growing need for privacy-conscious solutions.

Retailers, caught between the necessity of rich analytics and compliance with stringent regulations like GDPR and CCPA, are looking for alternatives to camera-based technologies that often capture sensitive biometric data.

The Role of Millimeter Wave Technology

Enter the Walkbase Millimeter Wave Sensor Solution: an innovative solution designed to provide powerful insights while prioritizing privacy. Unlike traditional in-store cameras, millimeter wave technology eliminates the risks of collecting biometric or personally identifiable information (PII). Using electo-magnetic technology, the Walkbase Millimeter Wave Sensor Solution tracks shopper movement and position anonymously, ensuring compliance with strict data protection laws and maintaining customer trust.

Key benefits of millimeter wave technology include:

  • Anonymous Data Collection: Tracks movement without capturing biometric data, significantly reducing risks from data breaches.
  • Improved Consumer Perception: Non-invasive systems that align with privacy expectations.
  • Actionable Insights: Delivers metrics like foot traffic patterns, dwell time analysis, and retail media ad impressions — without compromising consumer anonymity.

Why Privacy Is a Competitive Advantage

Adopting privacy-focused solutions is not just about regulatory compliance — it’s a strategic edge. Consumers increasingly prefer brands that respect their privacy, and technologies such as the Walkbase Millimeter Wave Sensor Solution showcase a commitment to ethical data practices and the customer experience.

As detailed in our white paper, we explain how these sensors also provide actionable metrics to optimize store layouts, analyze customer flow and track ROI for retail media networks. Additionally, they enable responsive content strategies, turning static in-store displays into dynamic, personalized experiences.

Download the Full White Paper

Our white paper offers a deeper dive into:

  • The regulatory landscape and its implications for retailers.
  • The limitations of traditional camera-based analytics.
  • The practical applications of millimeter wave technology in retail environments.

Discover how Walkbase is redefining retail analytics while setting new standards for privacy-focused innovation.

Download the White Paper

About the Author

Björn Sjölund is a co-founder and head of product development at Walkbase. With more than 15 years of experience and several patents in indoor positioning and retail analytics, he is a pioneer in creating data-driven solutions for modern retail challenges.

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