DMs-401

Basic contact angle meter

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The DMs-401 is a compact yet high-performance surface measuring instrument for the measurement of static and dynamic contact angles, the surface free energy of solids, and surface and interfacial tension of liquids. Its functions can be easily extended due to its sophisticated modular design. Optional accessories, such as a computer-controlled dispenser, temperature control devices, and an external tilting stage system are available.

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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

Hardware

Jacket- and heater-type chambers for temperature measurements from +10 to +380℃
Heater-type dispenser for temperature measurements from ambient to +380℃
Tilting stage for measurements of roll-off angles, incl. FAMAS software add-in [Sliding method]
Add-on module [Dynamic sliding method] for measurement of roll-off speed and roll-off acceleration. Only in combination with the tilting stage package
Fast image capturing system with standard 400 fps at 640x480 resolution USB3.0 CMOS camera, max. 2700fps at 640x64 resolution
Single automatic dispenser
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)

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 & 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 surface modification, digitalization of hydrophilicity/hydrophobicity

	DMs-401
Camera system	USB2.0 CMOS camera: 60fps at 640x480 pixels
Optical system	focus: manual focus with 3-step zoom field of view: 5.3x4.0mm, 9.6x7.2mm, 13.6x10.2mm ±6%
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 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
Accuracy¹⁾	contact angle: 0.2° surface/interfacial tension: 0.2mN/m
Maximum sample surface area and height (WxDxH)	150x100x35mm
Maximum sample weight	300g
Sample stage operation: Z-axis Droplet generation Dispensing resolution	150mm, manually by a rotary knob --- 20mm, manually by a rotary knob (additional 20mm by stage shifting mechanism)
Dispenser operation: Z-axis Droplet generation Dispensing resolution	--- manually, by a rotary knob 0.1μl
Droplet deposition	manually, by stage operation
Dimensions (WxDxH)	294x461x375mm
Weight	ca. 6.5kg
Electric power: Voltage Frequency Power consumption	AC100-240V 50/60Hz 5.5W 15VA
Operating environment	temperature: +10 to +35℃, humidity: 30-80%RH (non-condensing) positioned away from sources of electrical noise and vibration