KYOWA DMo Series- Versatile Devices

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.

Each model combines the following features

Fast image capturing system with standard 400 fps at 640x480 resolution USB3.0 CMOS camera, max. 2700fps at 640x64 resolution

Automatic single dispenser system

150x150mm wide sample stage with a maximum load capacity (temperature chamber + sample) of 1.4kgs

Stage travel distance: x-axis: 150mm, y-axis: 75mm, z-axis: fixed

Focusing aid with displayed index graph and 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

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

The following table describes the differences between the measuring process of each model

The following table describes the differences between the measuring process of each model

DMo model	Positioning of first measurement	Generation of droplet	Deposition of droplet (control / recognition)	Analysis of droplet	Positioning of next measurement	Full-scale continuous measurements
502	▲ by rotary knob	●	▲ / ●	●	▲	▲
602	▲ by rotary knob	●	● / ●	●	▲	▲
702	▲ by command button	●	● / ●	●	●	▲
902	●	●	● / ●	●	●	●

▲ manual ● automatic

Features

Automatic recognition of drop deposition by FAMAS analysis software

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 x- and y-axis for exact positioning

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

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)

Kit for captive-bubble-measurements

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)

1) This option is unavailable for the model DMo-902

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 and wide view)

Analysis of 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 surfaces

	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