HARKE HK-SPCA X1 Video-Based Optical Contact Angle Analyzer

Overview

The HARKE HK-SPCA X1 is a benchtop video-based optical contact angle analyzer engineered for precise, repeatable quantification of interfacial phenomena at solid–liquid–vapor boundaries. It operates on the principle of high-resolution silhouette imaging combined with advanced contour detection algorithms to determine contact angles via the sessile drop method, pendant drop method, and captive bubble technique. The system captures dynamic wetting processes—including advancing, receding, and rolling angles—enabling comprehensive assessment of surface heterogeneity, hysteresis, and temporal evolution of wettability. Designed for rigorous laboratory environments, the HK-SPCA X1 integrates a motorized precision syringe pump, adjustable LED backlighting, and a high-sensitivity CMOS camera with continuously variable optical magnification (0.7×–4.5×), ensuring optimal image contrast across diverse sample geometries and optical properties.

Key Features

• Automated liquid dispensing module with programmable volume control (0.1–10 µL increments) and low-dead-volume microsyringes for reproducible droplet formation
• Dual-mode analysis: static contact angle (sessile drop), dynamic contact angle (advancing/receding via continuous dispensing or tilting stage), and interfacial tension (pendant/captive bubble methods)
• Integrated surface energy calculation engine supporting Owens–Wendt, Wu, Fowkes, van Oss–Chaudhury–Good (vOCG), and Schultz two-liquid models
• Real-time contact angle vs. time curve generation with configurable acquisition rates (up to 60 fps) for absorption kinetics and spreading dynamics
• Modular hardware architecture enabling optional add-ons: temperature-controlled stage (−20°C to 120°C), environmental chamber (humidity/vacuum), high-speed imaging module, and fiber/powder holder fixtures
• Robust mechanical design with vibration-dampened aluminum alloy frame and precision-machined XYZ translation stage (±1 µm repeatability)

Sample Compatibility & Compliance

The HK-SPCA X1 accommodates flat, curved, porous, fibrous, and powdered substrates within its 100 mm × 120 mm fixed sample stage. Its optical flexibility supports measurements on transparent, translucent, and opaque materials—including glass, silicon wafers, polymer films, textiles, ceramics, and metal coatings. The system complies with ASTM D7334 (“Standard Practice for Surface Wettability of Coatings by Contact Angle Measurement”), ISO 19403-2 (“Plastics — Determination of contact angle”), and supports GLP/GMP documentation workflows through audit-trail-enabled software logging. All measurement protocols adhere to ISO/IEC 17025 traceability requirements when paired with NIST-traceable calibration standards (e.g., reference contact angle slides certified at 60°, 90°, and 120°).

Software & Data Management

The proprietary SPCA Analysis Suite v4.x provides intuitive workflow-driven operation with dual-language UI (English/Chinese), real-time image processing, and batch analysis capabilities. Software modules include automated baseline detection, ellipse/Young–Laplace fitting, dynamic hysteresis mapping, and export-ready reporting in PDF, CSV, and XML formats. Data integrity is ensured via 21 CFR Part 11-compliant user authentication, electronic signatures, version-controlled method templates, and immutable audit trails recording operator ID, timestamp, parameter settings, and raw image metadata. Exported datasets are compatible with MATLAB, Python (via .csv/.xlsx), and statistical analysis platforms such as JMP and Minitab.

Applications

• Surface functionalization validation in semiconductor manufacturing (e.g., HMDS priming, plasma treatment efficacy)
• Coating uniformity and cleanliness assessment in display glass and automotive lens production
• Hydrophobicity/hydrophilicity grading of biomedical implants and surgical textiles per ISO 10993-4
• Formulation optimization of inkjet inks, anti-fog coatings, and self-cleaning surfaces
• Quality control of powder flowability and dispersibility in pharmaceutical tablet excipients
• Interfacial thermodynamics modeling for enhanced oil recovery surfactants and emulsion stabilizers
• Adhesion work and surface free energy partitioning (polar/dispersive components) for composite bonding interface design

FAQ

What standard calibration procedures are supported?
The system includes certified contact angle calibration slides traceable to NIST SRM 2800 series, along with built-in geometric distortion correction and pixel-size calibration routines.
Can the instrument measure contact angles on rough or textured surfaces?
Yes—advanced edge-detection algorithms and multi-point baseline selection accommodate topographically complex surfaces; optional confocal height mapping integration is available for 3D surface correlation.
Is environmental control (temperature/humidity) available as an upgrade?
Yes—fully integrated Peltier-cooled stage and sealed humidity chamber (10–95% RH, ±2% accuracy) are factory-installable options with software-synchronized parameter logging.
How does the system ensure measurement reproducibility across operators?
Through standardized SOP templates, role-based access control, automated droplet placement positioning, and embedded uncertainty estimation per ISO/IEC Guide 98-3 (GUM).
Does the software support regulatory submissions for FDA or EMA filings?
Yes—full 21 CFR Part 11 compliance, ALCOA+ data integrity principles, and IQ/OQ documentation packages are provided for GxP-regulated laboratories.