The DMe-211Plus- An economical yet fully-featured contact angle meter with a computer image analysis system

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The DMe-211Plus- An economical yet fully-featured contact angle meter with a computer image analysis system

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.

 

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-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


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10mm, manually by a rotary knob

Dispenser operation:
Z-axis
Droplet generation
Dispensing resolution


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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