PW PWC-100 Optical Contact Angle Goniometer
| Brand | PW |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Authorized Distributor |
| Product Origin | Domestic (China) |
| Model | PWC-100 |
| Price Range | USD 2,800 – 28,000 |
Overview
The PW PWC-100 Optical Contact Angle Goniometer is a precision benchtop instrument engineered for quantitative characterization of solid–liquid interfacial phenomena. It operates on the principle of optical drop shape analysis—capturing high-resolution side-view images of sessile or pendant liquid droplets deposited on solid substrates, then applying advanced edge-detection algorithms to extract contact angle values with sub-degree resolution. The system supports static, dynamic (advancing/receding), and tilting-stage-based contact angle measurements, enabling rigorous evaluation of surface wettability, heterogeneity, and hysteresis behavior. Designed for laboratories engaged in materials science, coatings development, biomedical device testing, and quality control of functional surfaces, the PWC-100 delivers reproducible, operator-independent results aligned with ISO 19403-2 (Contact angle measurement — Part 2: Static contact angle) and ASTM D7334 (Standard Practice for Surface Wettability of Coated Surfaces by Contact Angle Measurement).
Key Features
- High-resolution monochrome CMOS camera (1280 × 1024 pixels) with adjustable LED backlighting and coaxial illumination for optimal droplet contrast and edge definition
- Motorized XYZ sample stage with micrometer-level positioning accuracy (±1 µm) and tilt capability up to ±15° for dynamic contact angle acquisition
- Integrated syringe pump with programmable dispensing (volume range: 0.1–10 µL per step; resolution: 0.01 µL) for repeatable droplet deposition
- Real-time image capture at up to 60 fps, supporting time-resolved wetting kinetics analysis (e.g., absorption, spreading, evaporation)
- Modular software architecture compatible with Windows 10/11; supports dual-camera configuration for simultaneous top- and side-view imaging (optional upgrade)
- Robust aluminum alloy frame with vibration-dampened optical baseplate, minimizing environmental drift during extended measurement sessions
Sample Compatibility & Compliance
The PWC-100 accommodates flat, curved, porous, and textured substrates with dimensions up to 150 mm × 150 mm × 50 mm (W × L × H). Sample holders are interchangeable—including hydrophobic/hydrophilic clamping fixtures, temperature-controlled stages (–20 °C to 80 °C, optional), and custom vacuum chucks for thin films or flexible electronics. All measurement workflows adhere to Good Laboratory Practice (GLP) documentation standards: audit trails record user ID, timestamp, parameter settings, raw images, and processed data. Software export functions generate CSV, PNG, and PDF reports compliant with internal QA/QC protocols and external regulatory review (e.g., ISO 9001-certified environments). While not FDA 21 CFR Part 11–validated out-of-the-box, the system supports electronic signature integration and data integrity configurations upon customer request.
Software & Data Management
The proprietary PW-CA Suite v4.x provides intuitive graphical interface navigation with multi-language support (English, German, Japanese, Simplified Chinese). Core analytical modules include Young–Laplace fitting (for pendant drop surface tension), Owens–Wendt–Rabel–Kaelble (OWRK) and Wu harmonic mean methods for surface energy decomposition, and polynomial-based baseline correction for non-horizontal substrates. Raw image metadata (exposure time, gain, lens focus position) is embedded in TIFF exports. Data synchronization via local network share or encrypted USB transfer ensures secure off-instrument archiving. Batch processing mode enables automated analysis of >100 images with customizable pass/fail thresholds for production-line screening.
Applications
- Quality assurance of plasma-treated polymers, anti-fog coatings, and hydrophobic textiles
- Surface energy mapping of printed circuit board (PCB) solder masks and adhesive bonding interfaces
- Characterization of biomaterials including dental composites, contact lenses, and tissue-engineered scaffolds
- R&D of nanocoatings, self-cleaning surfaces, and microfluidic channel wettability optimization
- Evaluation of cleaning efficacy on metal, glass, and ceramic substrates in semiconductor and automotive manufacturing
FAQ
What liquids are supported for contact angle measurement?
Deionized water is standard; other test liquids (e.g., diiodomethane, ethylene glycol, formamide) can be used provided their surface tension and density are input manually or selected from the built-in database of 32 reference fluids.
Can the PWC-100 measure surface tension of pure liquids?
Yes—via pendant drop analysis mode, with typical accuracy ±0.2 mN/m for liquids ranging from 10–72 mN/m.
Is calibration traceable to national standards?
The instrument includes certified glass calibration slides (contact angles: 30°, 60°, 90°, 120°) traceable to NIM (National Institute of Metrology, China); optional NIST-traceable certification available upon request.
Does the system support automation in high-throughput environments?
With optional robotic sample loader and API-driven control (RESTful interface), the PWC-100 integrates into automated metrology lines for unattended operation across 8+ hour shifts.
What maintenance is required?
Routine maintenance includes weekly lens cleaning with spectroscopic-grade methanol, quarterly syringe pump lubrication, and annual camera sensor alignment verification using factory-provided test patterns.
