Walmart Expands Automation With Sensor Technology to Track 90 Million Pallets
Walmart is making one of its largest investments in supply chain automation by embedding Bluetooth-based sensors into pallet labels, giving the retailer sharper visibility into the flow of goods across its U.S. network.
The rollout began with testing at a Texas warehouse in 2023 and has now reached 500 locations. By the end of 2026, Walmart plans to expand the program to all 4,600 U.S. stores and 40 distribution centers. The sensors, provided by San Diego-based technology company Wiliot, are just 0.7 mm² in size and are built into the shipping labels attached to shrink-wrapped pallets.
How the Sensors Work
Each sensor transmits data on where a pallet is located, how long it has been in place, and whether temperature-sensitive items remain within acceptable ranges. This information feeds directly into Walmart’s AI systems, creating a continuous stream of data that can be used for stocking decisions, freshness monitoring, and distribution planning.
By removing the need for manual scanning and handwritten checks, the technology addresses a longstanding challenge in retail: knowing precisely what inventory is available and where it sits in the network at any given time.
Why It Matters for Walmart and Its Suppliers
Greg Cathey, Senior Vice President of Transformation and Innovation at Walmart, described the initiative as tackling “one of the hardest problems in retail — knowing exactly what we own and where it is at any given moment.”
For suppliers, this means improved inventory accuracy, fewer delays in replenishment, and better management of perishable goods. The enhanced visibility should help reduce out-of-stocks while cutting down on waste from products that expire before reaching the shelf.
A Broader Automation Strategy
The sensor program is part of a larger strategy by Walmart to automate its operations with AI-driven solutions. The company has already introduced advanced tools for truck loading, distribution planning, and in-store support. Walmart has emphasized that the purpose of these systems is to reduce repetitive tasks rather than reduce headcount, allowing associates to focus on customer service and higher-value responsibilities.
Looking Ahead
The financial details of Walmart’s agreement with Wiliot have not been disclosed, but the retailer expects the technology to improve efficiency and lower operating costs across its vast grocery business. With over one-fifth of all groceries in the U.S. sold through Walmart, the ability to track 90 million pallets annually has significant implications for product availability, freshness, and customer satisfaction.
The Takeaway
Walmart’s nationwide deployment of sensor technology represents a meaningful shift in how retail inventory is tracked and managed. By combining real-time monitoring with AI decision-making, the company is setting a new standard for visibility and efficiency. For Walmart suppliers, the move underscores the importance of data accuracy, on-shelf availability, and working in sync with a supply chain that is increasingly connected and intelligent.
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