DMe-211
DMe-211: for simple measurements of contact angles in quality control
DMe-211: sample stage with manual z-axis
DMe-211: precise manual dispenser
The DMe-211 is an economical yet fully-featured contact angle meter with a computer image analysis system.
The unit combines manual droplet volume regulation, stage up/down motion for gentle deposition of droplets with "FAMAS-basic" software controlled analysis of static and dynamic contact angle (30fps) as well as surface and interfacial tension using the pendant drop method. Analysis software to determine the surface free energy of solids is a standard feature.
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Features
- 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
Options
Hardware
- Pendant drop kit for standard view, incl. pendant drop calibration standard
- Surface free energy kit
Applications
- 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
Specifications
| DMe-211 | ||
| 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: Owens-Wendt, Kaelble-Uy, Kitazaki-Hata, Wu, acid-base, Zisman |
|
| Measuring range |
contact angle: 0.1 to 180° surface/interfacial tension: 0.1 to 100mN/m |
|
| Resolution |
contact angle: 0.1° surface/interfacial tension: 0.1mN/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