Force Tensiometer

Sigma CMC

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

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What you can measure

Critical Micelle Concentration
Du Noüy ring and Wilhelmy plate methods
Surface tension
Du Noüy ring and Wilhelmy plate methods
Interfacial tension
Du Noüy ring and Wilhelmy plate methods
Dynamic contact angle
Wilhelmy methods
Surface free energy
Based on contact angle measurements
Powder wettability
Washburn method
Density
Density probe
Sedimentation
Sedimentation probe
Adhesion force
Liquid droplet pull-off method

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3 reasons to invest

Full CMC automation for high precision

Everything from measuring surface tension and changing surfactant solution concentration to analyzing the shape of the CMC curve automatically ensures a user-independent and unattended operation. Integrated magnetic stirrer ensures surfactant solution homogeneity.

Sophisticated software

The OneAttension software provides full versatility and automation, easy measurement setup, and live results. But above all, it is really user-friendly and intuitive. Includes features like autosearch to reduce CMC measurement time by automatically increasing the number of data points only around the CMC point.

Optimized yet versatile

Sigma CMC is an adaptable and versatile system that not only measures CMC but also has the full support of other surface measurement modes from surface tension to powder wettability. This ensures the system is future-proof for any measurement needs that may come to you.

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A closer look

Sigma CMC is based on the versatile Sigma 701 that is known for its particularly high sensitivity. It can also be used with the Sigma 700 which is optimized for powder wettability and contact angle measurements. Check out the system specifications below.

	Sigma 700	Sigma 701
Available Measurements
Surface tension	√	√
Interfacial tension	√	√
Critical Micelle Concentration	Automatic	Automatic
Dynamic contact angle	√	√
Surface free energy	√	√
Powder wettability	√	√
Density	√	√
Sedimentation	√	√
Balance Specifications
Measuring range (mN/m)	1…2000	1…2000
Displayed resolution (mN/m)	0.001	0.001
Density range (g/cm3)	0…2.2	0…2.2
Density resolution (g/cm3)	0.0001	0.0001
Maximum load (g)	210	5
Weighing resolution (mg)	0.01	0.005
Force resolution (µN)	0.1	0.05
Contact angle range (°)	0…180	0…180
Contact angle resolution (°)	0.01	0.01
Calibration & Locking	Automatic	Manual
Measuring Unit Specifications
Sample stage	Motorized	Motorized
Sample stage speed (mm/min)	0.01…500	0.01…500
Stage positioning resolution (µm)	0.016	0.016
Dimensions (L×W×H, cm)	33.3×24.4×62	33.3×24.4×62
Weight (kg)	16.3	13
Power supply (VAC)	85…264	85…264
Power consumption (W)	13	13
Frequency (Hz)	47…440	47…440
Common Accessories
Temperature control range (° C)	-20…+200	-20…+200
Stirrer	√	√
Software
Provided software	OneAttension	OneAttension
System Requirements
Recommended system requirements	1 GHz processor 1 GB RAM 40 GB hard disk drive (20 GB free) 1 USB-port Accessories such as water bath and liquid dispenser may require a free USB port
Operating system requirements	Windows 7 & 8 &10 (32 or 64 bit) Windows Vista (32 bit)

OneAttension Software

OneAttension software is a fine combination of a very intuitive interface and high functionality. Follow your experiment live and get the results within seconds. Let's have a look at the features!

OneAttension Features

Full automation
OneAttension supports fully automated measurements - get CMC values with a click of a button
Live analysis
The results are shown in real-time during the measurement. You can conveniently monitor your results as they are forming
Best in class interface
The software is easy to learn, and the logical interface allows even complex measurements to be performed with ease
Flexibility for every need
OneAttension has been designed to meet the requirements of almost any applications you may have. You can easily adjust measurement parameters to match your specific application needs
Data handling and exporting made simple
Data analysis, plotting, and statistical analysis can all be done with a few clicks to give you accurate results within seconds. All data can easily be exported further to Excel, for example
Optimal for industrial use
Measurement reports can be created with a few clicks and the user manager conveniently handles all different users – with desired privacy levels. Autosearch function saves measurement time

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.

Learn more

We have gathered all our in-depth knowledge associated with Sigma 700/701. Browse around amongst webinars, overviews and white papers to find a topic of interest.