DMo series

Versatile contact angle meters

Application Notes

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The four models of the DMo series are high-performance contact angle meters, only differing in their grade of automation. The high-speed camera and computer-controlled dispenser allow for precise measurements of static and dynamic contact angles, surface and interfacial tension of liquids, as well as analysis of surface free energy of solids. A wide range of options are available and lower grade models can also be upgraded later.

Citations

Our devices are widely recognized as benchmark tools across various scientific and research fields.
This acknowledgment is solidified by their frequent citation in numerous scholarly publications.
We encourage you to explore the articles below, highlighting our technology's extensive use and impact.
Feel free to download and share them within your networks.

Product Promotion Video

DMo-702

This 11-minute video provides a comprehensive overview of the functions and benefits of the Kyowa DMo-702.

Different Degrees of Automation

The following overview highlights the differences in measurement processes across the DMo series models.

Step 1

First positioning

Step 2

Droplet generation

Step 3

Droplet deposition

Step 4

Droplet analysis

Step 5

Next positioning

Step 6

Full-scale continuous

Model	First positioning	Droplet generation	Droplet deposition (control/recognition)	Droplet analysis	Next positioning	Full-scale continuous
DMo-902	Auto	Auto	Auto/Auto	Auto	Auto	Auto
DMo-702	Manual (Command button)	Auto	Auto/Auto	Auto	Auto	Manual
DMo-602	Manual (Rotary knob)	Auto	Auto/Auto	Auto	Manual	Manual
DMo-502	Manual (Rotary knob)	Auto	Manual/Auto	Auto	Manual	Manual

■ Main Features

Fast image-capture system with standard 400 fps at 640x480 resolution, USB 3.0 CMOS camera, max. 2700fps at 640x64 resolution
Automatic single dispenser system 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
Automatic recognition of drop deposition by FAMAS analysis software
Live image display and droplet volume monitoring
150x150mm wide sample stage with a maximum load capacity (temperature chamber + sample) of 1.4 kg
Fine adjustable stage for exact positioning, travel distance: x-axis: 150mm, y-axis: 75mm, z-axis: fixed
Focusing aid with displayed index graph, value, and brightness adjustment to achieve perfect focus
Movie converter to convert data images to MPEG-1 or AVI movie format
Determination of contact angles, droplet volume, residual droplet volume, sessile drop volume, height, and radius of the sessile drop
Measured results are displayed in a spreadsheet for easy reference and comparison, and saved in CSV format for easy export to and manipulation in MS Excel
User-specified analysis report function, providing measurement results and parameters
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

■ Optional Hardware Accessories

Jacket- and heater-type chambers for temperature measurements from +10 to +380℃ ¹⁾
Heater-type dispenser for temperature measurements from ambient to +380℃ ¹⁾
Tilting stage for measurements of roll-off angles, incl. FAMAS software add-in [Sliding method] ¹⁾
Add-on module [Dynamic sliding method] to measure roll-off speed and roll-off acceleration. Only in combination with the tilting stage package. ¹⁾
Multi-manual dispenser holder
Multi-automatic dispenser system
Large capacity pump dispenser, incl. a 50ml liquid container
Surface free energy kit
Pendant drop kit (for standard & wide view)
Captive-bubble measurement kit
Droplet calibration standard (for wide 1 view)
Pendant drop calibration standard (for standard view)
Pendant drop calibration standard (for wide 1 and wide 2 view)

■ Key Application Areas

Determination of the wettability of surfaces like glass, metal, plastics, and ceramics at ambient temperature
Surface cleanliness
Determination of surface and interfacial tension using the Pendant drop kit (standard and wide view)
Analysis of the surface free energy of solids
Determination of dynamic contact angles (advancing/receding angles and roll-off angle)
Coating property, Repellency, Characterization of droplet hysteresis
Initial spreading, absorbing property, effect of surface active agents
Adhesive property, characterizing surface modification, digitalization of hydrophilicity/hydrophobicity

	DMo-902	DMo-702	DMo-602	DMo-502
Camera system	USB 3.0 CMOS camera with: 400fps at 640x480 pixels 500fps at 640x400 pixels 1000fps at 640x200 pixels 2700fps at 640x64 pixels
Optical system	focus: manual focus with 3-step manual zoom field of view: 6.1x4.7mm, 11.1x8.2mm, 15.8x11.8mm ±6%
Measuring methods	contact angle: sessile drop (static), advancing/receding angle (dynamic) sliding angle (dynamic) ¹⁾ surface/interfacial tension: pendant drop (static and dynamic)
Analysis methods	contact angle: θ/2, tangent, curve fitting (ellipse, circle) surface/interfacial tension: Young-Laplace, ds/de surface free energy of solids: 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
Accuracy²⁾	contact angle: 0.2° surface/interfacial tension: 0.2mN/m
Maximum sample surface area and height (WxDxH)	150x150x16mm	150x150x35mm
Sample stage operation: X-axis Y-axis Z-axis Rotation axis	150mm (aut.) 75mm (aut.) --- 360° (aut.)	150mm (aut.) 75mm (man.) --- ---	150mm (man.) 75mm (man.) --- ---
Dispenser operation: Z-axis Droplet deposition Droplet generation Droplet resolution	16mm automatic automatic 0.1μl	35mm automatic automatic 0.1μl		35mm manual automatic 0.1μl
Dimensions (WxDxH) of: Main instrument Control box	297x544x305mm 290x240x86mm			288x544x305mm 260x200x70mm
Approximately weight of: Main instrument Control box	10.0kg 4.3kg	8.5kg 4.3kg		7.5kg 1.5kg
Electric power: Voltage Frequency Power consumption	AC100-240V 50/60 Hz 115W 120VA			AC100-240V 50/60Hz 25W 48VA
Operating environment	temperature: +10 to +35℃, humidity: 30-80%RH (non-condensing) positioned away from sources of electrical noise and vibration

¹⁾ An optional external tilting stage is required
²⁾ Accuracy is the repeatability in terms of standard deviation based on the manufacturer’s calibration standard