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The DMe-211Plus is an economical yet fully-featured contact angle meter with a computer image analysis system.
The unit combines manual droplet volume regulation, and stage up/down motion for gentle deposition of droplets with "FAMAS-basic" software-controlled analysis of static and dynamic contact angle (30fps) and surface and interfacial tension using the pendant drop method. Analysis software to determine the surface free energy of solids is a standard feature.
Citations
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- Automatic recognition of droplet deposition
- Live image display and droplet volume monitoring
- Movie converter
- Manual dispenser with a set of 5 glass syringes and 5 SUS needles for precise adjustment of droplet volume and quick refilling and replacement of liquid samples
- Fine adjustable stage in z-axis for gentle deposition of droplets without distortion
- Adjustable level of the body and stage
- Droplet calibration standard for standard view, bearing one full circle for calibration and three droplet silhouettes of 5º, 60º, and 108º for periodic inspection of measurement accuracy
Hardware
- Pendant drop kit for standard view, incl. pendant drop calibration standard
- Surface free energy kit
- Determination of wettability of surfaces like glass, metal, plastics, ceramics at ambient temperature
- Surface cleanliness
- Determination of surface and interfacial tension using the pendant drop kit (standard view)
- Analysis of surface free energy of solids
| DMe-211Plus | ||
| Camera system | USB2.0 CMOS camera: 30fps at 640x480 pixels | |
| Optical system |
focus: manual focus with fixed zoom field of view: 6.3x4.7mm |
|
| Measuring methods |
contact angle: sessile drop (static and dynamic) surface/interfacial tension: pendant drop (static and dynamic) |
|
| Analysis methods |
contact angle: θ/2, tangent, circle fitting, ellipse fitting surface/interfacial tension: Young-Laplace method, ds/de method surface free energy: OWRK, Owens-Wendt, Kaelble-Uy, Kitazaki-Hata, Wu, acid-base, Zisman |
|
| Measuring range |
contact angle: 0 to 180° surface/interfacial tension: 0 to 2000mN/m |
|
| Resolution |
contact angle: 0.01° surface/interfacial tension: 0.01mN/m |
|
| Accuracy1) |
contact angle: 0.3° surface/interfacial tension: 0.3mN/m |
|
| Maximum sample surface area and height (WxDxH) | 160x100x10mm |
|
| Maximum sample weight | 300g | |
| Sample stage operation: X-axis Y-axis Z-axis |
--- --- 10mm, manually by a rotary knob |
|
| Dispenser operation: Z-axis Droplet generation Dispensing resolution |
--- manually, by a rotary knob 0.1μL |
|
| Droplet deposition | manually, by stage operation | |
| Dimensions (WxDxH) | 170x346x283mm | |
| Weight | ca. 1.8kg | |
| Electric power |
USB bus power DC5V, max. 500mA |
|
| Operating environment |
temperature: +10 to +35℃, humidity: 30-80%RH (non-condensing) positioned away from sources of electrical noise and vibration |
|
1) Accuracy is the repeatability in terms of standard deviation based on the manufacturer’s calibration standard
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