PAT1M
Our PAT1M is based on this methodology and due to its modular architecture, compact design and highly accurate and efficient software it is one of the best instruments of this type worldwide. The process of measurement consists of the image acquisition of the drop/bubble profile, its digitalization and final fitting by the Gauss-Laplace equation. A fully computer controlled dosing system allows to perform pre-programmed measurements with any type of protocol, including constant drop volume or constant drop surface area. Changes of the drop/bubble area according to a given protocol, as it is the case for relaxation experiments, is also possible, i.e. the response of the interfacial layer to harmonic or transient area perturbations can be recorded and hence the surface dilational visco-elasticity determined. The method has many advantages over others, most of all it can be applied to liquid/gas and liquid/liquid interfaces, requires small amounts of liquid, and the temperature control is possible in a rather broad range. Even high temperature experiments are feasible with a special temperature cell.
- High end full automatic profile analysis instrument
- Modern method to measure surface and interfacial tension of liquids
- Interfacial Rheology Studies are available in the basic version
- Modular extensions for different applications
Principle is based on the analysis of the shape of pendent and sessile drops or buoyant and captive bubbles.
Rheological studies are available in the basic version.
Well suited to determine the contact angle of liquids on solid surface.
Rheological studies are available in the basic version.
Well suited to determine the contact angle of liquids on solid surface.
Hardware
Instrumental parts
- Basic platform on which all parts are safely mounted
- Manual x/y/z-axis
- Automatic computer-controlled precise dosing system
- Mechanically adjustable temperature controlled measuring cell (temperature range 10 to 100 °C)
- Industrial USB 3.0 CMOS camera with fixed objectives
- LED lighting with continuously adjustable intensity
Features
Measurement Features
- Surface and interfacial tension of liquids
- Static and dynamic contact angle according to the sessile drop method
- Determinanion of surface free energy
- Surface rheological studies to measure the dilational elasticity and viscosity
- Capillary pressure measurements for iso-dense liquid-liquid systems (optional modul DPA-1M)
- Surface rheological studies at higher frequency (optional modul ODBA-1M)
- Direct drop-drop, bubble-bubble and drop-bubble interactions (optional modul DBMM-1M)
- Fluid dynamic experiments with optional set-up incl. our own high speed video camera HSC
Main features of the software
- on-line interfacial tension/contact angle calculation
- very accurate control loop to keep constant either volume or area of drop or bubble
- smooth oscillations with dosing system
- harmonic and transient relaxation experiments
- calculation of the dilation rheological parameters from relaxation measurements via Fourier analysis
- calculation of the surface free energy of solids (different methods)
- Surface and interfacial tension of liquids
- Static and dynamic contact angle according to the sessile drop method
- Determinanion of surface free energy
- Surface rheological studies to measure the dilational elasticity and viscosity
- Capillary pressure measurements for iso-dense liquid-liquid systems (optional modul DPA-1M)
- Surface rheological studies at higher frequency (optional modul ODBA-1M)
- Direct drop-drop, bubble-bubble and drop-bubble interactions (optional modul DBMM-1M)
- Fluid dynamic experiments with optional set-up incl. our own high speed video camera HSC
Main features of the software
- on-line interfacial tension/contact angle calculation
- very accurate control loop to keep constant either volume or area of drop or bubble
- smooth oscillations with dosing system
- harmonic and transient relaxation experiments
- calculation of the dilation rheological parameters from relaxation measurements via Fourier analysis
- calculation of the surface free energy of solids (different methods)
Technical Specifications
Range of Surface and Interfacial tension | 1 to 2000 mN/m resolution: ± 0.01 mN/m | ||
Range of contact angle measurement | 1° to 179° accuracy ±0.2° | ||
Dosing | built-in automatic dosing system (optional second automatic dosing system) | ||
Measuring options | surface / interfacial tension dilational elasticity and viscosity contact angle surface free energy drop/bubble oscillations 0.001 to 0.5 Hz (basic version) up to 100 Hz (ODBA-1M module) | ||
Additional measurement modules | drop pressure module DPA-1M oscillating drop bubble oscillation module ODBA-1M drop bubble micro manipulator DBMM-1M | ||
Optics | manual fixed or zoom objectives | ||
Camera | Industrial 3.1 MP CMOS-camera: resolution 2048 x 1536 pixelsUSB 3.0 | ||
Frame rate | Rates for standard camera: 60 images/s at resolution 2048x1536 pixels 370 images/s at resolution 640x480 pixels 740 images/s at resolution 640x240 pixels 1500 images/s at resolution 640x120 pixels | ||
Axes | manual x-axis, manual y-axis, manual z-axis | ||
Illumination | LED, software controlled light intensity | ||
Software | Windows Application free update over 1 year after purchase | ||
Supported OS | Windows 7, 8, 8.1, 10 or 11 | ||
Interface | USB 3.0 | ||
Size of device (L xW x H) | 700 x 200 x 270 mm (standard version) | ||
Weight | 18 kg | ||
Power supply | external 100 … 240 AC to 24 VDC, 40 W | ||
Extra accessories | adjustable temperature controlled cell additional automatically controlled dosing system (up to 4 systems) coaxial double capillary for drop exchange liquid exchange cell piezo control unit special contact angle cell high temperature cells |