The Acustrip Biuret Micrometer allows manufacturers, jobbers, retailers and end users to monitor and maintain the quality of DEF in their entire supply chain with lab-analysis supported field testing. This enables users to identify issues early. The patented Biuret Micrometer and process measures the presence of Biuret in DEF. The meter displays 0, 0.1, 0.2, 0.3, 0.4, 0.5 or greater percentages, which show that service is needed above 0.3 percent per ISO 22241.