Charles River Automates Endotoxin Testing Production

Charles River Laboratories has brought online a fully automated manufacturing system for its Endosafe bacterial endotoxin testing cartridges, achieving significant gains in quality control, traceability, and production efficiency, according to details first reported by the company.

The Endosafe Cartridge Technology Automated Manufacturing Suite reached full operational capacity in the third quarter of 2026 at the company's Wilmington, Massachusetts facility. The system represents a major capital investment in advanced manufacturing technology designed to meet growing global demand for endotoxin testing products used in pharmaceutical and biotechnology quality control.

Why it matters

Endotoxin testing is a critical quality control step in pharmaceutical manufacturing, required to detect bacterial contamination before drugs reach patients. By automating cartridge production with 100% inspection coverage rather than sampling-based quality control, Charles River is addressing a key vulnerability in the supply chain for these essential testing products. The productivity gains also position the company to scale production without proportional increases in labor costs—a significant competitive advantage as demand grows.

Measurable performance improvements

Since reaching full operation in July 2026, the automated suite has delivered quantifiable operational benefits across multiple metrics. The system achieved an 87% improvement in labor productivity and manufacturing efficiency, enabling higher throughput with reduced staffing requirements.

Quality metrics also improved substantially. Invalid cartridge rates dropped 13% compared to manual production, while scrap rates decreased 2%. Production capacity increased 14% across the company's Trillium and LAL cartridge product lines.

"Automation and advanced inspection technologies give us greater visibility into manufacturing performance while strengthening process control and traceability," said Daniel Fernandes, Senior Site Director for Microbial Solutions at Charles River.

Full inspection replaces sampling

A key differentiator of the new system is its ability to inspect every cartridge produced rather than relying on statistical sampling methods. The automated suite performs comprehensive inspections across critical quality parameters including cartridge thickness, reagent fill levels via imaging, package seal integrity, and digital traceability markers.

Each cartridge receives a unique identifier that enables lifecycle traceability. Manufacturing teams can access inspection images, measurements, and packaging data for individual units, supporting faster root cause investigations and process optimization.

Strategic workforce redeployment

The automation initiative has enabled Charles River to redirect skilled manufacturing personnel to higher-value activities. "By reducing the manual effort required to manufacture cartridges, we have been able to redirect skilled employees to higher-value initiatives that contribute to continuous improvement and long-term growth," said Matt Hewitt, Corporate Vice President and Chief Technology Officer for Manufacturing.

The system also incorporates automated flat-tray packaging, reducing manual handling and improving raw material consistency across both automated and remaining manual production processes.

Charles River Laboratories provides research products and services to pharmaceutical, biotechnology, government, and academic customers globally. The company views the automated manufacturing suite as a platform for ongoing innovation rather than a one-time upgrade, according to statements from company leadership.

These details were first reported by Charles River Laboratories in a company announcement.