Egypt tender for supplying tensiometer
Tensiometer for Dynamic and static surface and Interfacial tension
1. Features
The instrument allows the following measurements:
- dynamic and static surface and interfacial tension of liquid / liquid or liquid / gas.
- Static and dynamic contact angle according to the sessile drop method
- Determination of surface free energy
- Capillary pressure measurements for iso-dense liquid-liquid systems.
- Surface rheological studies at higher frequency.
- Direct drop-drop, bubble-bubble and drop-bubble interactions.
- Characteristics of a surfactant.
- Adsorption of surfactant onto a powder.
- Executing the measurements with heavier sample chambers up to 200°C at pressures over the range from 0.1bar to 200 bar.
- Computer controlled syringe pump (syringe pump rate up to 10 µL / s).
- Video imaging system (resolution 640 x 480 pixels).

2. Main features of the software
- On-line interfacial tension/contact angle calculation.
- Smooth oscillations with dosing system
- Harmonic and transient relaxation Experiments.
- Calculation of the dilation rheological parameters from relaxation measurements via Fourier analysis.
- Calculation of the surface free energy of solids (different methods).
- Control of the dosing system for accurate changes of a drop or bubble (transient or harmonic changes).
- Exporting measurement results and switching to spread sheet type software as excel.
- Dynamic contact angle measurement
- Calculated surface elasticity or rigidity by data analysis of measurement;
- Comparing the results of the different measurements easily;
- Also software allows the user to select and control at given end-point, either the interfacial tension, drop volume, or drop area, using feedback from image analysis data to control the syringe pump.

3. Technical Specifications
Range of surface and interfacial tension:
Less than 0.1 mN/m
resolution: ± 0.1 mN/m
Range of contact angle measurement:
1° to 180°
accuracy ±0.3°

Dosing:
Built-in automatic dosing system (optional second automatic dosing system).

Software:
Windows ™ software performs the following functions:
- measures surface tension, interfacial tension and contact angle at three different speeds using three different calculation algorithms
- controls syringe pump to oscillate a drop and measure drop area, volume and complex elastic modulus, including the elastic and viscous components of elastic modulus.
- allows the user to select and control at a given end point, either the interfacial tension, drop volume or drop area using feed back from image analysis data to control the syringe pump.
- focus, camera gain, verticality and size calibration
- file storage, retrieval, display and exportation
- free update each year after purchase (option)

Interface: USB and FireWire
Size of device (L x W x H): (standard version)

Extra accessories:
- adjustable temperature controlled cell
- computer controlled syring pump (syring pump rate up to 10 µl/s)
- Sample cell for interfacial tension measurement.
- Electronic cabinet containing (power supplies and power switches for syring motor, stirrer motor, light source and CCD camera – push buttons
- computer interface card and all interface cables).
- refrigerated circulation bath to measure up to 200 0C and pressure of 1 to 200 bars.
- telecentric lens with magnification factor 0.5x.
- syring pump
- thermostatic jacket for the large cuvette (30x30x70mm).
- magnetic stirrer.
- temperature sensing probe in the range (15-100 0C).
- integrating sphere light source with one spare bulb.
- optical bench.
- 2 syring 250 ml and 2 100 ml (J-shaped and strait needle, 20 gauge).
- 6 cuvette extra.
- Calibration sphere for instrument set up.
- instruction manual with software tutorial delivered on CD.
- UPS available for instrument.
- Cylinder Nitrogen Gas with Regulator.
- Circulation Bath for temperature control
- Brand Name PC - Computer Attached With Laser Printer.

Training:
Abroad training in manufacturing country for 7 days (for 2 persons)