Force Tensiometer

Sigma CMC

Fully automated critical micelle concentration (CMC) determination with high accuracy.

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Measurements

CMC CMC for critical micelle concentration measurement Requires additional dispensers
Density For liquid and solid density measurements
Sedimentation For sedimentation kinetics
Adhesion Force For adhesion studies
Dynamic contact angle For advancing and receding angles
Surface and interfacial tension measurements Surface tension/interfacial tension with Du Noüy ring, Wilhelmy plate or rod

Determine critical micelle concentration of your solution

Add two dispensers

To minimize cleaning and contamination issues

Fully automated measurements

Let the instrument to do the work for you

Key features

Advanced sample stage

Advanced sample stage with integrated stirrer included. Connect temperature or pH probe to monitor your sample if needed
Stand-alone operation

Measure surface and interfacial tension and liquid density in stand-alone mode
Free-hang and fixed hook

Hang your probe on the hook for perfect alignment or fix in place when measuring viscous liquids
Multiple probe options

Probes for surface and interfacial tension measurements, density, dynamic contact angle, sedimentation, adhesion force and adsorption studies
High precision sample stage with large movement range

Up to 125 mm movement range to allow measurements with large samples. Superior movement accuracy for most sensitive measurements
Ionizer

Remove static discharge with the optional ionizer

All-inclusive system

Software made with you in Mind

Experience the seamless combination of intuitive interface and powerful functionality with OneAttension. It provides live analysis, complete automation, and flexible measurement settings. Simplifying analysis with straightforward data management and industrial-grade reporting.

Applications

Electronics
Environment
Batteries
Food & beverages
Chemicals
Energy
Coatings
Paper & board
Biotechnology & medical devices
Pharmaceutical
Oil & gas

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A closer look

Sigma CMC is based on the versatile Sigma that is known for its particularly high sensitivity. It can also be used with the Sigma Peak which is optimized for powder wettability and contact angle measurements. Check out the system specifications below.

Measurement Capabilities

Surface tension	√
Interfacial tension	√
Critical micelle concentration	Automatic (Included)
Dynamic contact angle	√
Surface free energy	√
Powder wettability	√
Density	√
Sedimentation	√
Adhesion force	√

Measurement Performance

Surface tension range	1...2000 mN/m
Displayed resolution	0.001 mN/m
ST resolution - ring	0.01 mN/m
ST resolution - plate	0.02 mN/m
Contact angle range	0...180 °
Contact angle resolution	0.01 °
Washburn angle range	0...90 °
Density range	0....2.2 g/cm³
Density resolution	0.001 g/cm³

Balance & Force Sensing

Max. load - Standard balance	250 g
Weight resolution	0.1 mg
Force resolution	1 μN
Measurement rate	50 Hz
Taring	Automatic
Calibration & locking	Automatic

Sample Stage & Motion

Travel distance	125 mm
Sample stage	Motorized
Sample stage speed	0.001 - 800 mm/min
Stage positioning resolution	16 nm

Instrument – Physical & Electrical

Dimensions (Lx W x H)	265 x 300 x 500 mm
Weight	17 kg
Power supply	100...240 VAC
Frequency	50 - 60 Hz
Power consumption	20 W
Connectivity	USB-C
Standalone mode	Yes
PC-controlled mode	Yes

Accessories

Ionizer	Optional
pH Sensor	Optional
Temperature control range	-20...+200 °C
Stirrer	Included
Bubble level	Built-in
Ambient temperature sensor	Built-in
Thermostatic vessel	Optional
Temperature probe	Optional

Software & System requirements

Software provided

OneAttension, Standalone

Operating system

Windows 10 / 11

System requirements

1 GHz processor

1 GB RAM

40 GM Hard disk drive (20 GB free)

1 USB-C port

2 USB A-ports

Accessories such as water bath may require additional USB ports

Advanced software. Standalone simplicity.

Sigma Peak is powered by OneAttension, a full PC-based software platform for advanced product development and research. For faster routine work, the built-in standalone mode lets you perform everyday surface and interfacial tension measurements without a computer. One instrument, full flexibility.

OneAttension Software

All inclusive

Software is always included in the instrument price with all measurement capabilities.
Free updates

Keep your software up-to-date with free of charge updates and upgrades.
Unlimited licenses

Install to as many computers you want, analyze the data on your personal laptop to save instrument time.

Integrated Software

Touch display control

Using the standalone mode in Sigma CMC allows for quick surface and interfacial tension as well as density measurements when only routine work is needed
QC formulation testing

Use Sigma CMC to test your quality control routine. Making the measurements in standalone mode with Sigma Peak ensures that the method works in QC settings.
Material inspection

Use the standalone mode to inspect the incoming material quickly to ensure it meets your quality requirements.

Intuitive UI with several measurement options

Standalone mode has intuitive user interface allowing measurements of surface and interfacial tension with Du Noüy ring, surface tension with Wilhelmy plate, density as well as transformer oil quality following ASTM D971 and IEC 62961 standards.

Default setting and guided measurement

Each measurement type has default settings that can be used in most use cases. If needed, modification of the most important parameters can be done. User interface will guide the operator through the measurement steps.

Results displayed on screen and .pdf

Immediately after the measurement is completed, the results are shown on the instrument screen. Each measurement will automatically create .pdf file, up to 100 of them can be stored in the instrument memory. Connect the instrument to computer or phone via USB-C and store the reports to external drive, quality system or share with the colleagues.

Add more possibilities

Have a look at a few of the accessories that can be used for added capabilities. You can find the full range below in the accessory brochure.

Platinum Du Nouy ring

Pt-Ir-ring made to fulfill the requirements at least in following standards; ISO 301, ISO 4311, ISO 6889, ASTM D1331 and ASTM D 971. Includes also additional weight for push-mode.

Platinum Wilhelmy plate

Platinum Wilhelmy plate with micro roughened surface.

Thermostatic vessel (from -20 to +200°C)

For temperature control of the sample liquid. A heat exchange vessel with fluid jacket type of construction.

Temperature probe

PT-100 temperature measurement probe with holder. The temperature is shown in OneAttension software.

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What others say

Our instruments are present at many prestigious universities and research facilities world wide. Take a minute to find out what others say about Sigma instruments.

citat8

Researcher at Riken

"We wanted the most accurate force tensiometer on the market for our research on surface tension. Our in-depth testing of the Attension force tensiometer convinced us: it is the one."

Riken, Japan

Riken is a Japanese research institute established in 1917. Its research areas include physics, chemistry, biology, medical science, engineering and computational science.

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