DRD's revolutionary Dual Resolution Displacement (DRD) invention offers significant performance and reliability advantages for handling small samples and high sample dilution in a broad range of analytical instruments, robotics and bioprobe immunoassay applications. DRD represents a quantum leap ahead of the most advanced conventional syringe-and-plunger devices. DRD's invention of two pistons with slightly different diameters -- moving together or separately within the common chamber -- allows a single DRD pump to

• handle an extraordinary volume range, accurately and precisely metering both very small samples and very large reagent volumes.
• deliver without hanging drops.
• operate long-term without seal replacement.
• replace two or more syringe pumps.