Orbit Research Associates Private Limited

DSA100HP is our high-quality solution for the precise measurement of contact angle and surface tension and interfacial tension under high pressures and temperatures, primarily for tertiary oil recovery.

The DSA100HP combines our Drop Shape Analyzer – DSA100 for optical drop shape analysis with a high-quality measuring cell for high-pressure applications ranges for 40/690 and 1750 bars . It determines the surface tension, and analyzes the wetting of oil-bearing rock by surfactant solutions under the extreme pressure and temperature conditions found in reservoirs. The results help in the extraction of oil from layers of rock in the most effective manner using tertiary oil recovery (EOR) methods such as steam or surfactant flooding, and thereby increase the yield.

The instrument equally reliably measures the wettability by gases which liquidize under pressure, for example for optimizing extraction processes with carbon dioxide.The precise measurement of surface tension under storage conditions using the DSA100HP is very informative in the characterization of a surfactant solution which is used for flooding a crude oil reservoir. This should be as low as possible to ensure that the rock is well wetted.

Versatile options for dosing and measuring

With the aid of the dosing units of the DSA100HP, the drop liquid and the surrounding phase easily reach the inside of the high pressure cell. Rock samples can be positioned from the outside to measure the wettability at different positions while maintaining the pressure. The flexible design also allows contact angle measurements in a surrounding liquid phase. Precise temperature control up to 250 °C is achieved by means of an electric heater.

Reliable drop shape analysis thanks to high imaging quality

The DSA100HP features a high-resolution camera and a quality zoom lens for accurate display of the drop with optimum size. The high image quality that this achieves leads to a precisely measured contact angle or surface/interfacial tension. Combined with the intelligent image evaluation algorithm of the ADVANCE software, drop shape analysis with the instrument provides exact results.


Measuring methods and options

- Contact angle measurement using a sessile drop
- Surface tension of a liquid in gas or interfacial tension between two liquids using a pendant drop
- Upside-down pendant drop measurement of an oil drop in water
- Measurements at pressures up to 1750 bar and temperatures between -10 and 250 °C

Drop formation device:

·        High Pressure Screw Piston Pump / Automated dosing unit.

·        Moveable sample stage under pressure

·        Diameter of the needle can be chosen in different interchangeable sizes

Features:

• New heatable mini dosing systems are available which requires low sample volume & is easy to handle.
• Measuring range is variable upto 1750 bar & upto 250°C
• Enables to work under extreme reservoir conditions.

Applications:

• Surface tension of surfactant solutions & their interfacial tension with oil under storage conditions.
• Wettability of & extraction of oil from oil bearing rocks.
• Pressure extraction by means of liquefied gases e.g. CO₂
• Development of surfactants for liquid gases.

Note: Price may vary depending on configuration & accessories.

The entry level instrument for measuring contact angle, Surface Free energy and Surface & Interfacial Tension measurement by Pendant drop method.

The system uses high speed high resolution USB3 camera and compatible iwth 64 bit Windows 10.

 

Features:

• Modular single or double-dosing unit – manual or software-controlled
• Optional zoom optics for variable field of view or budget-friendly fixed focal length
• With optional internal temperature measurement
• Software modules for contact angle, surface free energy of solids and surface tension of liquids
• The instrument is available in three versions, Basic, Standard & Expert.
• The measurements can be performed at room temp or at controlled atmosphere

Applications:

• Characterization of surface pre-treatment processes
• Checking the wettability of plastic,glass,ceramic,wood or metal
• Checking the surface cleanliness

Note:
The price will vary depending on configuration and accessories.

Drop Shape Analysis System DSA30 is a middle level series of Contact angle instrument for research and quality control applications. These measuring instruments are commonly used to measure surface free energy, contact angle, roughness and surface tension. Products offered by us are also appraised by our customers for their varied salient features.

Features:

• Contact angle measuring instrument
• Modular measuring system, can be extended at any time
• High degree of automation possible
• Static or dynamic contact angle measurements
• High-temperature measurements at controlled relative humidity

Other Details:

• Optics with manual or software-controlled zoom
• One to three axes, manually or software-controlled
• Manual or motor-driven single dosing system
• 4-fold dosing system for automatic liquid selection
• Standard or high-speed camera
• Modular software in basic, standard or expert versions

Note:
The price will vary depending on configuration and accessories.

Mobile Surface Analyser MSA measures surface free energy with two liquids, fully automatically and mobile using our new "One-Click SFE" method. The MSA doses two parallel drops with one click, followed by the direct analysis of the contact angles and derive the results of the surface free energy. All steps are automated and happen within a second. The precise measurement and scientific evaluation are performed with a single button click. Thus, measurement errors due to incorrect operation are virtually ruled out.

The MSA One-Click SFE is optimally equipped for the mobile and non-destructive quality control due to the power connection to a notebook and its low weight and small footprint. The instrument analyzes samples of any size, such as automobile bodies.

Tasks and application:

• Measurement on large workpieces and finished products such as automobile parts
• Determination of the wettability of solid materials before coating or bonding
• Quality assurance of pre-treatment and coating processes
• Quality assurance of cleaning steps
• Testing the effectiveness of hydrophobic coatings

Note:
The price will vary depending on configuration and accessories.

Drop Shape Analysis System for fully-automatic determination of contact angle and surface free energy. Complete software control of the most important instrument functions makes fully automated measuring sequences possible. The most popular contact system in the market with associated patent. We offer these products at very reasonable price rates.

Applications:

• Static and dynamic contact angles measurement
• Determination of polar and dispersive components
• Lewis acid and base components and hydrogen bond forces
• Measurement of interfacial and surface tension of liquids
• Completely modular building block system
• For measuring large samples version with long frame
• Manual or automatic sample positioning
• Manual or automatic dosing of up to 8 test liquids
• Various temperature, high pressure and environmental chambers
• Wide range of dosing modules
• EDM/ODM module
• Characterization of surface treatments
• Characterization of new surfaces
• Investigating adhesion properties
• Testing surface purity
• Quality control (QC) for wafers and microelectronics
• Measurement of the cleaning behavior of surfactant solutions
• Characterization of the print-ability of surfaces
• Testing the wetting properties of plastics, glass or metal

Note: Price may vary depending on variant/ accessories

Drop Analysis from a bird's-eye view

The measurment of contact angle on concave surfaces/depressions is a challenge, the Top View AnalyzerTVA100 measures the contact angle from the top using the distance between spots of light reflected from the curved drop surface. This technique allows nondestructive measurements on concave surfaces or surfaces in recesses in which a measurement of the shadow image with the illumination, sample and optics in a single plane is ruled out. The measuring head is available as a module for the well-proven KRÜSS DSA100, DSA30 and EasyDrop instruments and also as an independent portal system for contact-free measurements on large samples.

An overview of the TVA100:

• Evaluation of surface curvature using the mirror images of spots of light
• Measurement on concave surfaces or in depressions
• Robust precision dosing for a wide range of liquids
• Rapid assessment of wetting homogeneity

Available as:

• Top View Analyzer TVA100
• Module for KRÜSS DSA25, DSA30 and DSA100 instruments
• Portal system (TVA100R) for contact-free measurements on large samples Offered angle measuring systems that are based on latest technology and make use of the image of light spots that are reflected by the curved surface of the drop to measure the contact angle.

Applications:

• Biotechnology (microtiter plates / 96well plates)
• Microelectronics (mounted PCBs)
• Wafer techniques
• Sanitary ceramics
• Optics (concave lenses)
• Quality control in surface cleaning processes

Note:
The price will vary depending on configuration and accessories.

Drop Shape Analyzer DSA30R perform measurements of Interfacial Rheology and gives the relevant results for optimizing products and processes.

The measuring principle of the DSA30R involves evaluating video images of drops or gas bubbles at a dosing needle to measure the surface or interfacial tension (SFI/IFT). The interface size is sinusoidally changed during this process. The SFT/IFT is measured as a function of the surface change and is also sinusoidal in the case of samples containing surfactants.

The dosing unit’s extremely precise piezo drive enables exact sine waves in a frequency spectrum of 0.001 to 20 Hz, so the measurements cover a very wide dynamic range.

Many innovations around the DSA30R turn formerly complex interfacial rheological analytics into an easy-to-perform method with quick sample changing. The filled glass syringe is inserted in a few simple steps and coupled automatically to the dosing feed.

To determine the influence of temperature, or to make investigations of high-viscosity systems easier, the syringe is embedded in a temperature-controlled sleeve for measurements between -10 and 70 °C. The temperature of the surrounding phase can also be controlled. Moreover, the start of certain processes such as the beginning of oscillation can be automatically linked to the target temperature being reached. This ensures reproducible conditions without user intervention.

Applications: -

■ Emulsions and foams for food or personal care
■ Flooding mixtures and foam in enhanced oil recovery
■ Demulsifiers
■ Defoamers and antifoamers
■ Surfactant research

We offer measurement services for contact angle measurement using KRUSS Drop shape analysis systems, we also offer a range of instruments available, which are as follows:

• DSA 25 Series
• DSA30 Series
• DSA 100 Series
• Mobile Surface Analyzer
• Top View Analyzer
• Large Surface Analyzer

Note: The price indicated are for measurement of contact angle by sessile drop, please see the price of each instrument in respective instrument details.

Precise wettability analysis on extremely small surfaces.

The Micro configuration of our DSA30 was specially designed to investigate the contact angle on surfaces which require very small drops for analyzing them. The DSA30M solves this task with a picoliter dosing system and powerful microscope optics. The result is a versatile instrument that provides precise contact angle and surface free energy results for samples such as hairs or the screw windings of dental implants.

Tasks and applications

- Wettability measurement on small electronic parts
- Contact angle on hair and synthetic single fibers
- Investigating the biocompatibility of dental implants
- Wetting of nozzles of an inkjet print head

Measuring methods and options

- Contact angle between a liquid and a solid
- Surface free energy from contact angles of two test liquids using all common models
- Static contact angle, advancing angle

Perfectly equipped for microdrop analysis

The available dosing units for 20 or 60 picoliter minimum volume dispense microscopically small drops of test liquid onto the sample. The fine positioning of the dosing unit and the sample allows precise placement of the drops. Working with two test liquids also enables the surface free energy to be calculated. This result provides important information for the adhesion, e.g. of fiber coatings.

Providing optimum image quality for precise analysis

Thanks to the high-quality microscopic lens and powerful illumination, the DSA30M has high image quality that enables reliable measurement results from image analysis. With the help of the instrument’s high-speed camera, even ultra-small, rapidly evaporating drops can be easily analyzed.

The Wilhelmy plate method measures:

• Surface tension (SFT) of a liquid,

• Interfacial tension (IFT) between liquids,

• Contact angle (θ) between liquid and solid.

A thin plate is dipped vertically into the liquid, and the force FFF on it is measured. The force relates to surface tension and contact angle by:

F=σ×L×cos⁡θF = \sigma \times L \times \cos \thetaF=σ×L×cosθ

• σ\sigmaσ = surface or interfacial tension,

• LLL = wetted perimeter of the plate,

• θ\thetaθ = contact angle.

For SFT/IFT:
A platinum plate is used, with contact angle ≈ 0°, so

σ=FL\sigma = \frac{F}{L}σ=LF​

For contact angle:
Dip the solid plate in a liquid with known σ\sigmaσ, then calculate

cos⁡θ=Fσ×L\cos \theta = \frac{F}{\sigma \times L}cosθ=σ×LF​

The method is static and can measure dynamic contact angles by immersing and withdrawing the plate. The wetted length LLL must be known and constant.

The Washburn method measures the contact angle and surface free energy of porous materials like powders and textiles by observing how a liquid is drawn up into the material via capillary action.

A glass tube filled with powder is dipped in a test liquid, and the liquid’s mass uptake over time is recorded. Treating the powder as many tiny capillaries, the relationship between mass squared (m2m^2m2) and time (ttt) is linear and described by the Washburn equation:

m2=cσcos⁡θηρ×tm^2 = \frac{c \sigma \cos \theta}{\eta \rho} \times tm2=ηρcσcosθ​×t

• ccc is a capillary constant related to pore size and packing,

• θ\thetaθ is the contact angle,

• σ,η,ρ\sigma, \eta, \rhoσ,η,ρ are the liquid’s surface tension, viscosity, and density.

To find ccc, measure with a fully wetting liquid (contact angle 0∘0^\circ0∘), then use this to calculate θ\thetaθ for other liquids.

Notes:

• Powder packing must be consistent since ccc depends on bulk density.

• Angles above 90° cannot be measured (no wetting). For these, drop shape analysis is used instead.