HARKE HK-SPCA-Y Automated Contact Angle Goniometer

Overview

The HARKE HK-SPCA-Y Automated Contact Angle Goniometer is a precision optical instrument engineered for quantitative characterization of solid–liquid–gas interfacial phenomena. It operates on the principle of high-resolution silhouette imaging combined with advanced contour detection algorithms to determine contact angles via the sessile drop, pendant drop, tilting plate, and captive bubble methods. The system captures dynamic interfacial behavior—including advancing/receding angles, contact angle hysteresis, roll-off (sliding) angles, and time-dependent wetting kinetics—enabling rigorous evaluation of surface wettability, heterogeneity, and chemical uniformity. Designed for reproducible operation in regulated R&D and QC environments, the goniometer integrates motorized liquid dispensing, programmable stage tilt (±90°), and real-time image acquisition synchronized with environmental control inputs (optional). Its modular architecture supports ISO 14782, ASTM D7334, and ISO 15989-compliant workflows for surface energy component analysis and interfacial tension quantification.

Key Features

• Fully automated liquid delivery system with syringe pump and precision microdispensing nozzle (volume resolution ≤0.1 µL)
• Motorized bi-directional sample stage tilt mechanism (0–90° forward/backward, ±0.1° repeatability)
• High-sensitivity CMOS camera (1920 × 1080 @ 60 fps) with adjustable LED backlight and coaxial illumination
• Optical zoom lens system (0.7×–4.5× magnification) enabling sub-pixel edge detection for contact angle resolution down to 0.01°
• Large-format fixed sample stage (400 × 400 mm) accommodating irregular or oversized substrates including wafers, textiles, and composite panels
• Integrated software-controlled environmental chamber interface (temperature/humidity monitoring compatible with external controllers)
• Compliance-ready audit trail logging, user access levels, and electronic signature support aligned with GLP/GMP and FDA 21 CFR Part 11 requirements

Sample Compatibility & Compliance

The HK-SPCA-Y accommodates diverse sample geometries and material classes: flat rigid substrates (glass, silicon, metals), flexible films, porous membranes, powders (via compressed pellet or scaffold mounting), curved surfaces (cylindrical lenses, tubing), and superhydrophobic/superhydrophilic coatings. Surface energy calculations employ Owens–Wendt–Rabel–Kaelble (OWRK) and Wu harmonic mean models; interfacial tension determination follows the pendant drop method per ISO 19403-2 and ASTM D1331. All measurement protocols are traceable to NIST-traceable reference liquids (e.g., water, diiodomethane, ethylene glycol). The system meets CE marking requirements and conforms to IEC 61000-6-3 (EMC) and IEC 61010-1 (safety) standards.

Software & Data Management

HARKE SPCA Analysis Suite v4.2 provides intuitive workflow-driven measurement sequencing, real-time contour fitting (B-spline and ellipse-based algorithms), and batch processing for multi-sample studies. Raw image sequences, metadata (timestamp, ambient conditions, operator ID), and derived parameters (θ_adv, θ_rec, Δθ, γ_LV, γ_SV) are stored in encrypted SQLite databases with configurable export to CSV, PDF, or XML formats. Version-controlled calibration logs, instrument configuration snapshots, and user activity records satisfy regulatory data integrity requirements. Optional cloud synchronization enables cross-site collaboration while preserving local data sovereignty.

Applications

• Surface treatment validation in semiconductor photolithography and plasma etching processes
• Quality control of anti-fingerprint coatings on display glass and touch panels
• Characterization of hydrophilic/hydrophobic modifications in biomedical device polymers (e.g., catheters, implants)
• Formulation development for inkjet inks, conformal coatings, and functional textile finishes
• Quantitative assessment of cleaning efficacy and residue detection on metal substrates
• Dynamic wetting analysis of absorbent materials (e.g., wound dressings, filtration media)
• Surface energy mapping of heterogeneous catalysts and battery electrode coatings
• Interfacial thermodynamics modeling for surfactant systems in agrochemical and pharmaceutical suspensions

FAQ

What standard test methods does the HK-SPCA-Y support?
It implements ASTM D7334 (surface wettability of plastics), ISO 14782 (contact angle measurement), ISO 15989 (dynamic contact angle), and ISO 19403 series (surface energy calculation).
Can the system measure contact angles on powders or rough surfaces?
Yes—via compressed pellet preparation or scaffold-based immobilization; optional high-magnification lens kits improve edge resolution on textured topographies.
Is the software compliant with FDA 21 CFR Part 11?
Yes—audit trail, electronic signatures, role-based access control, and data immutability features are enabled by default and validated upon installation.
Does the instrument support interfacial tension measurements in liquid–liquid systems?
Yes—the pendant drop module supports both liquid–air and liquid–liquid interfacial tension determination using Young–Laplace curve fitting.
What environmental controls can be integrated?
Temperature and humidity sensors may be connected via analog input; third-party environmental chambers with RS232/RS485 or Ethernet interfaces are supported through API integration.