The DMs-401 is a compact yet high-performance surface measuring instrument designed for measuring static and dynamic contact angles, the surface free energy of solids, and the surface and interfacial tension of liquids. Its advanced modular design allows for easy functionality expansion. Optional accessories include a computer-controlled dispenser, temperature control devices, and an external tilting stage system.
Features
• Automatic recognition of droplet deposition
• Live image display and droplet volume monitoring
• Movie converter functionality
• Manual dispenser with 5 glass syringes and 5 SUS needles for precise droplet volume adjustment and quick refilling/replacement of liquid samples
• Fine adjustable stage along the z-axis for gentle droplet deposition without distortion
• Adjustable level for both the body and stage
• Droplet calibration standard for standard view, featuring one full circle for calibration and three droplet silhouettes (5º, 60º, 108º) for periodic accuracy checks
OPTIONS
Hardware:
• Jacket and heater-type chambers for temperature measurements (+10 to +380℃)
• Heater-type dispenser for temperature measurements (ambient to +380℃)
• Tilting stage for roll-off angle measurements, including FAMAS software add-in [Sliding method]
• Add-on module [Dynamic sliding method] for roll-off speed and acceleration measurements (requires the tilting stage package)
• High-speed image capturing system with a USB3.0 CMOS camera, standard 400 fps at 640x480 resolution, maximum 2700 fps at 640x64 resolution
• Single automatic dispenser
• Multi-manual dispenser holder
• Multi-automatic dispenser system
• Large capacity pump dispenser with a 50 ml liquid container
• Surface free energy kit
• Pendant drop kit (for standard and wide views)
• Kit for captive-bubble measurements
• Droplet calibration standard (for wide view)
• Pendant drop calibration standards (for standard, wide 1, and wide 2 views)
Applications
• Determination of surface wettability (glass, metal, plastics, ceramics) at ambient temperature
• Surface cleanliness analysis
• Measurement of surface and interfacial tension using the pendant drop kit (standard and wide views)
• Analysis of surface free energy of solids
• Measurement of dynamic contact angles (advancing/receding angles and roll-off angle)
• Coating property evaluation, repellency tests, and droplet hysteresis characterization
• Assessment of initial spreading, absorption properties, and the effect of surface-active agents
• Adhesive properties and surface modification characterization, including hydrophilicity/hydrophobicity digitalization
Specifications
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DMs-401
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Camera system
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USB2.0 CMOS camera: 60fps at 640x480 pixels
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Optical system
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focus: manual focus with 3-step zoom
field of view: 5.3x4.0mm, 9.6x7.2mm, 13.6x10.2mm ±6%
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Measuring methods
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contact angle: sessile drop (static and dynamic)
surface/interfacial tension: pendant drop (static and dynamic)
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Analysis methods
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contact angle: θ/2, tangent, circle fitting, ellipse fitting
surface/interfacial tension: Young-Laplace method, ds/de method
surface free energy of solids: OWRK, Owens-Wendt, Kaelble-Uy, Kitazaki-Hata, Wu, acid-base, Zisman
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Measuring range
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contact angle: 0 to 180°
surface/interfacial tension: 0 to 2000mN/m
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Resolution
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contact angle: 0.01°
surface/interfacial tension: 0.01mN/m
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Accuracy1)
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contact angle: 0.2°
surface/interfacial tension: 0.2mN/m
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Maximum sample surface area and height (WxDxH)
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150x100x35mm
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Maximum sample weight
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300g
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Sample stage operation:
Z-axis
Droplet generation
Dispensing resolution
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150mm, manually by a rotary knob
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20mm, manually by a rotary knob
(additional 20mm by stage shifting mechanism)
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Dispenser operation:
Z-axis
Droplet generation
Dispensing resolution
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manually, by a rotary knob
0.1μl
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Droplet deposition
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manually, by stage operation
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Dimensions (WxDxH)
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294x461x375mm
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Weight
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ca. 6.5kg
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Electric power:
Voltage
Frequency
Power consumption
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AC100-240V
50/60Hz
5.5W 15VA
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Operating environment
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temperature: +10 to +35℃, humidity: 30-80%RH (non-condensing)
positioned away from sources of electrical noise and vibration
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> PRODUCTS> Contact Angle & Wettability Measurement > > Optical contact angle measuring and contour analysis systems > KYOWA DMs-401 - Contact Angle Meter Basic Device 
