Instrument: Kruss DSA25 Standard Drop Shape Analyzer
Manufacturer: Kruss Scientific
General Description: The Kruss DSA25S measures contact angles and surface energies through droplet shape analysis. A motorized syringe dispenses controlled liquid volumes onto surfaces while a camera captures droplet profiles. Image analysis software calculates contact angles from droplet geometry based on various theoretical models. The system performs static measurements or dynamic advancing and receding angle determinations through controlled volume changes. Contact angle measurements with multiple characterized liquids enables surface free energy calculations through multi-component analysis. Zoom optics accommodate varying droplet sizes while maintaining measurement resolution. The instrument characterizes wettability for evaluating surface treatments including plasma activation, chemical modification, and coating effectiveness. Applications include adhesion prediction, cleaning verification, hydrophobic coating assessment, and surface pretreatment qualification across polymers, metals, ceramics, and coated substrates.