Krüss DSA25E Drop Shape Analyzer
| Origin | Germany |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | DSA25E |
| Pricing | Available Upon Request |
Overview
The Krüss DSA25E Drop Shape Analyzer is a high-precision optical instrument engineered for the quantitative characterization of interfacial phenomena at solid–liquid, liquid–vapor, and liquid–liquid boundaries. Based on the pendant/sessile drop method and axisymmetric drop shape analysis (ADSA), the system determines contact angles, surface free energy (SFE), surface tension (SFT), interfacial tension (IFT), and dynamic wetting behavior through rigorous image-based modeling of droplet or bubble contours. Its core measurement principle relies on fitting experimentally captured droplet profiles to the Young–Laplace equation under controlled environmental conditions—enabling thermodynamically consistent derivation of interfacial parameters with high reproducibility. Designed for R&D laboratories and QC environments in coatings, adhesives, packaging, biomedical materials, and surface functionalization industries, the DSA25E supports both static and dynamic interfacial analysis—including advancing/receding contact angles, roll-off angle determination, and time-resolved SFE evolution.
Key Features
- Micro-constant-pressure dual-dosing system enabling rapid, repeatable dispensing of two test liquids for one-click SFE calculation via Owens–Wendt, Wu, or van Oss–Chaudhury–Good models
- Optional third-liquid dosing module for SFT validation, IFT measurement, or enhanced SFE uncertainty reduction
- High-resolution monochrome CMOS camera (≥1280 × 1024 px) coupled with motorized zoom lens (0.7–4.5× magnification) for optimal droplet imaging across wide volume ranges (0.1–10 µL)
- Integrated temperature- and humidity-controlled sample stage (optional environmental chamber: −10 to 80 °C, 10–90% RH non-condensing)
- Motorized tilting stage (±90°, 0.01° resolution) for automated roll-off angle and hysteresis quantification
- Advanced ADVANCE software with real-time contour detection, sub-pixel edge localization, and ISO/ASTM-compliant image evaluation algorithms
Sample Compatibility & Compliance
The DSA25E accommodates flat, curved, porous, and textured substrates—including polymers, metals, ceramics, glass, paper, textiles, and biomaterials—with no geometric constraints beyond standard stage dimensions (max. 150 × 150 mm). It supports standard test liquids (e.g., water, diiodomethane, ethylene glycol) as well as user-defined formulations (viscosity ≤50 mPa·s, surface tension ≥20 mN/m). All measurements comply with ASTM D7334 (surface energy of polymer films), ISO 19403-2/-4 (contact angle and SFE), and ISO 1409 (interfacial tension of polymer solutions). The ADVANCE software includes audit trail functionality, electronic signature support, and 21 CFR Part 11–ready configuration options for GLP/GMP-regulated environments.
Software & Data Management
ADVANCE software provides full instrument control, automated workflow scripting, and comprehensive data processing. Users define standardized SOPs—including dosing sequences, image acquisition intervals, tilt protocols, and evaluation models—which are executed without manual intervention. Raw images, fitted contours, and parameter tables are stored in vendor-neutral HDF5 format with embedded metadata (timestamp, environmental conditions, operator ID, calibration status). Batch processing tools enable comparative analysis across sample sets; export modules generate CSV, Excel, and PDF reports compliant with internal QA documentation requirements. Optional modules include SFT/IFT time-series analysis, hysteresis mapping, and adhesion work calculation (Wa = γLV(1 + cosθ)).
Applications
- Quality assurance of plasma, corona, or flame treatment efficacy on polyolefins, PET, or metal foils
- Quantitative evaluation of hydrophobic/hydrophilic coating performance and aging stability
- Adhesion prediction for inkjet inks, laminating adhesives, and medical device coatings
- Characterization of self-cleaning and anti-fouling surfaces (e.g., lotus-effect mimics)
- Interfacial rheology screening for emulsion and foam stabilizers in food, cosmetics, and EOR formulations
- Surface heterogeneity assessment via contact angle distribution analysis and spatial mapping
FAQ
What measurement methods does the DSA25E support?
Static/dynamic sessile drop, captive bubble, pendant drop, tilting plate (roll-off), and dual-liquid SFE calculation.
Can the system measure surface tension of low-surface-tension liquids?
Yes—within the validated range of 1–72 mN/m, using pendant drop analysis with density correction.
Is environmental control integrated or optional?
Temperature and humidity control are optional add-ons; the base system operates at ambient lab conditions (20–25 °C, 40–60% RH).
How is data integrity ensured for regulated environments?
ADVANCE supports user-level access control, electronic signatures, full audit trails, and configurable electronic record retention per ALCOA+ principles.
Does the DSA25E require routine calibration?
Lens distortion and dosing volume calibration are performed during initial setup and annually thereafter; certified reference standards (e.g., goniometer calibration slides, surfactant solutions) are supplied.
