Force Tensiometer

Sigma CMC

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

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Discover Attension Sigma CMC and all of its advantages in this 1 minute long video.

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 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

Superior balance resolution

For increased accuracy
Multiple probe options

To cover all your measurement needs
Integrated magnetic stirrer

To ensure homogeneity of the solution

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

Widen you view

In this 1-minute video, you will get a quick view of Sigma CMC. For the best experience, watch it in fullscreen mode!

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.