Sigma 700/701

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Sigma 700/701

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The outstanding versatility of Sigma 700 and 701 force tensiometers makes them suitable for research and development, industrial quality control, routine measurements as well as academic research. Both instruments are computer controlled and have a high level of automation.

Features & Benefits

High precision microbalance and mechanics
All-inclusive OneAttension software for efficient and convenient operation and data storage
Fully automated measurements avoids user variation and saves time
Wide range of measurement modes for efficient instrument use
Ergonomic and open design for easy access to the different parts of the instrument.

Product details

Sigma 700 and Sigma 701 are state-of-the-art force tensiometers that are able to perform a wide range of measurements and adapt to a great variety of experimental settings. This versatility makes them suitable for research, development, industrial quality control and educational use.

The highly sensitive instruments offer high precision surface and interfacial tension measurements (Platinum Du Noüy ring, Platinum Wilhelmy Plate, Platinum rod). They also offer fully automated critical micelle concentration (CMC) determination and measurement of dynamic contact angle, surface free energy, powder wettability, sedimentation and density.

Sigma 700 and 701 are computer-controlled instruments operated with OneAttension software. The software provides a high level of automation, live analysis capability, multiple measurement options as well as a logical and friendly user interface. At present, there is no equivalent on the market.

Sigma 700 is a multipurpose tensiometer well suited for dynamic contact angle and wettability measurements of heavy solids and powder samples. It has an auto-calibrating microbalance that measures over a wide range and can take a maximum load of 210 g.

Sigma 701 is also a multipurpose tensiometer equipped with a different microbalance that measures in a narrower weight range with high sensitivity. It has a maximum load of 5 g. The sensitivity of Sigma 701 makes it optimal for dynamic contact angle measurements of fibers.

Mọi chi tiết vui lòng liên hệ với chúng thôi theo thông tin:
CÔNG TY TNHH VINTEK
Địa chỉ: 280/130 Bùi Hữu Nghĩa, Phường 2, Quận Bình Thạnh, Thành phố Hồ Chí Minh
Điện thoại: 0913146368
Email: vintek-info@vintekco.com

	Sigma 700	Sigma 701	Sigma 702	Sigma 702ET	Sigma 703D
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…1000	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 movement range (mm)	0…75	0…75	0…75	0…75	–
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	27.5×15.5×39.2
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 mechanism	Range of water bath accessories	Range of water bath accessories	Built-in thermostatic vessel for water bath	Thermostatic vessel for water bath	Range of water bath 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 RS-232 port
Operating system requirements	Windows 7 & 8 (32 or 64 bit) Windows Vista (32 bit) Windows XP SP3 (32 bit)

Application examples
Sigma 700/701—The instrument of choice for surface tension measurement.

Critical micelle concentration measurement in aggregation behavior studies
Critical micelle concentration (CMC) is defined as the concentration of surfactants in which micelles are spontaneously formed. Above the CMC point surfactants aggregate into micelles and surface tension becomes independent of surfactant concentration.

Porphyrins are heterocyclic macromolecules that have a wide variety of applications in drugs, targeting agents and molecular electronics. One of the best-known porphyrins is heme, the pigment in red blood cells. It is know that strong intermolecular interactions occur between porphyrins and surfactants. The nature of these interactions has been studied since CMC and aggregation can play an important role in drug delivery.

For more information, see:

Application Note 6 — Critical Micelle Concentration Measurement in Aggregation Behavior Studies

Wettability of pharmaceutical powders
Understanding the wetting behavior of powders is important to the pharmaceutical industry, where the use of different powder compounds can affect drug dissolution rates and release characteristics.

The wettability of powders can be measured by using the Washburn method with Sigma 700 or 701. In the Washburn method the contact angle is calculated from the weight increase over time when the powder is in contact with the liquid.

For more information, see:

Application Note 7 — Wettability of Pharmaceutical Powders

A schematic of the powder wettability method.