
Profile Analysis Tensiometers
Advanced instruments for surface and interfacial characterization.
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Contact Angle Module
The CA-1P extends the PAT-1P with accurate contact angle measurements for sessile drops. Combining precision optics, industrial CMOS imaging and intuitive software, it enables reliable characterization of surface wettability, cleanliness and surface free energy.

5°–175°
Contact angle range
1280 × 960
CMOS resolution
PAT-1P
Compatible platform
The CA-1P module
The CA-1P extends the PAT-1P with precise contact angle measurements based on the sessile drop method. By analyzing the shape of a liquid drop on a solid surface, the system provides quantitative information about wettability, surface cleanliness and surface treatment quality.
High-resolution industrial imaging, manual liquid dispensing and an adjustable x/y/z measurement stage provide a compact and reproducible workflow for laboratory analysis and industrial quality control.
Measurement capabilities
Explore the experimental capabilities of the CA-1P.

Determine static contact angles using the sessile drop method to quantitatively evaluate the wettability of solid surfaces.
Verify cleaning processes and surface treatments through reliable wettability measurements for laboratory and industrial applications.
Capture sharp sessile drop profiles using an industrial CMOS camera and optimized optical components for precise image evaluation.
A manually adjustable measurement stage enables accurate sample alignment and repeatable contact angle measurements.
The precision manual dosing system produces stable sessile drops for consistent and reproducible surface analysis.
Determine the surface free energy of solids using established contact angle methods to support material development and quality control.
Performance
Key operating parameters and measurement capabilities of the CA-1P.
5°–175°
Measure static contact angles across a broad wettability range with an accuracy of ±0.3°.
1280 × 960
High-resolution imaging captures accurate sessile drop profiles for reliable contact angle evaluation.
25 fps
Continuous image acquisition enables precise drop profile analysis for routine laboratory and quality control applications.
PAT-1P
Designed specifically for the PAT-1P, providing reliable contact angle analysis in a compact and user-friendly system.
Values may depend on configuration, measurement mode and optional modules.
Measurement principle
The CA-1P determines the contact angle by evaluating the profile of a sessile drop resting on a solid surface. The equilibrium between the liquid, solid and surrounding gas defines the drop geometry, allowing precise characterization of surface wettability, cleanliness and surface free energy.

Measurement method
Sessile drop analysis
Optical system
Industrial CMOS camera
Scientific output
Wettability & surface free energy
Compatible instrument
The CA-1P is a dedicated expansion module for the PAT-1P Profile Analysis Tensiometer. It combines high-resolution optical imaging, precision mechanics and intuitive contact angle analysis to deliver reliable surface characterization in a compact laboratory system.
Applications
The CA-1P supports routine contact angle measurements for material characterization, surface treatment verification and industrial quality assurance. Its compact design makes it suitable for research laboratories, production environments and educational institutions.
Scientific publications
Research
Publications and scientific references related to interface characterization.
The CA-1P is used in research and industrial laboratories for contact angle measurements, wettability characterization, surface free energy determination and surface quality evaluation. Explore scientific publications using the CA-1P and related contact angle methods.
Our publication database identifies verified studies performed with SINTERFACE instruments.
Technical information
Explore the measurement capabilities, optical system, software functions and technical specifications of the CA-1P Contact Angle Module.
Static contact angle measurements
Sessile drop analysis
Surface wettability characterization
Surface cleanliness evaluation
Surface free energy determination
Pendant drop measurements
Surface and interfacial tension measurements
Optional automatic drop volume and area control
PAT-1P optical platform
Manual liquid dispensing
Manual x/y/z positioning stage
Industrial CMOS camera
Fixed objective optics
LED illumination
USB interface
Real-time contact angle calculation
Automatic image fitting
Surface free energy evaluation
Transient relaxation experiments
Fourier-based data evaluation
Experimental data export
Additional capillaries
Automatic dosing module
Specifications may vary depending on configuration, software version and optional modules.
Downloads
Access operating instructions, technical documentation and supporting resources for the CA-1P Contact Angle Module.
Additional manuals and software downloads are available through the SINTERFACE customer portal.
Visit download centerCA-1P
Discuss your surface characterization requirements with our specialists. The CA-1P seamlessly integrates into the PAT-1P platform, providing accurate and reliable contact angle measurements for research and industrial quality control.