What you can measure

Surface tension
Du Noüy ring and Wilhelmy plate methods
Interfacial tension
Du Noüy ring method
Critical Micelle Concentration
Manual measurements with Du Noüy ring and Wilhelmy plate methods
Density
Density probe

See it in action

This short video will give you a quick view of how Attension Sigma 702 works as well as the main advantages of the force tensiometer. Watch the video in fullscreen for the best experience!

3 reasons to invest

Quick to learn

This instrument has a simple and open design with an intuitive user interface. It is really quick to learn and keep on going.

High precision

Thanks to the motorized sample stage and the ultrasensitive balance, surface and interfacial tension can be detected automatically and precise. An excellent fit for quality control and research.

Results in real-time

Your results are displayed live on a large integrated screen. In other words, no need for an external computer. If you want to, you can easily print or export the results.

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A closer look

Dive into the specifics of Sigma 702 and compare it to our other instruments to make a smart decision on what you need.

	Sigma 700	Sigma 701	Sigma 702	Sigma 702 ET	Sigma 703 D
Available Measurements
Surface tension	√	√	√	√	√
Interfacial tension	√	√	√	√	√
Critical Micelle Concentration	Automatic	Automatic	Manual	Manual	Manual
Dynamic contact angle	√	√	_	_	_
Surface free energy	√	√	_	_	_
Powder wettability	√	√	_	_	_
Density	√	√	√	√	√
Sedimentation	√	√	_	_	_
Balance Specifications
Measuring range (mN/m)	1…2000	1…2000	1…1000	1…1000	1…1000
Displayed resolution (mN/m)	0.001	0.001	0.01	0.01	0.01
Density range (g/cm3)	0…2.2	0…2.2	0…2.2	0…2.2	0…2.2
Density resolution (g/cm3)	0.0001	0.0001	0.0001	0.0001	0.0001
Maximum load (g)	210	5	5	5	5
Weighing resolution (mg)	0.01	0.005	0.01	0.01	0.01
Force resolution (µN)	0.1	0.05	0.1	0.1	0.1
Contact angle range (°)	0…180	0…180	–	–	–
Contact angle resolution (°)	0.01	0.01	–	–	–
Calibration & Locking	Automatic	Manual	Manual	Manual	Manual
Measuring Unit Specifications
Sample stage	Motorized	Motorized	Motorized	Motorized	Manual
Sample stage speed (mm/min)	0.01…500	0.01…500	0.01…500	0.01…500	–
Stage positioning resolution (µm)	0.016	0.016	0.26	0.26	–
Dimensions (L×W×H, cm)	33.3×24.4×62	33.3×24.4×62	33.3×24.4×62	33.3×24.4×62	27.5×15.5×39.
Weight (kg)	16.3	13	10.7	10.7	4.9
Power supply (VAC)	85…264	85…264	85…264	85…264	100…240
Power consumption (W)	13	13	13	13	7
Frequency (Hz)	47…440	47…440	47…440	47…440	50…60
Common Accessories
Temperature control range (° C)	-20…+200	-20…+200	-20…+200	-20…+200	-20…+200
Stirrer	√	√	–	–	–
Software
Provided software	OneAttension	OneAttension	Data receiver	Data receiver	Data receiver
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)

Embedded Software and Data Receiver

Sigma 702 comes with a powerful embedded software that guides the user in the measurements and shows the results on the integrated screen. Data can be also stored in PC with Data Receiver software for additional data storage and reporting.

Software Features

Standalone
Run the measurements and read the results onscreen
Intuitive and easy to run
The software guides you in the measurement process
Versatile data storage
Read the results onscreen, send them to PC or print them out with an optional printer
Automated
Set the parameters and press start, everything else will be done for you

Add more possibilities

Check out accessories and modules available for Sigma 702. We selected a few favorites for you, but you can always find the whole list below.

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)

Chamber made from Teflon and Aluminum for temperature control of the sample liquid. A heat exchange vessel with fluid jacket type of construction. Heating/cooling of the fluid jacket requires external bath/circulator (T102ME or T102USB). Fits glass sample vessel 70 mm in diameter (T104). Operable temperature range from -20 to +200°C .

t705a

For printing results directly from instrument into paper.

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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 our Sigma Instruments.

citat8

Researcher at Riken, Japan

"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.