Produse pentru unghi de tensiune (7)

The tensiometers of the DCAT series are measuring instruments for force-based investigation of surface and interface properties. Because of the compact and modular product design of the DCAT series, a bespoke combination of device and accessories can be found for any use case. The DCAT 15 is the standard model of the DCAT series and offers more measurement methods and modular extensions compared to the entry-level models. In addition to measuring surface and interfacial tension as well as density, the DCAT 15 can be used to determine dynamic contact angles, the surface energy of solids and to investigate sedimentation and penetration properties. Together with the LDU 25 liquid dosing unit, automatic concentration series can be generated to determine the critical micelle formation concentration. Measurements: - surface and interfacial tension - liquid and solid density - dynamic contact angles - surface energy of solids - determination of the critical micelle concentration (CMC)

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The optical contact angle meters of the OCA series are high-precision measuring systems for the characterisation of interfaces and surfaces. They combine high-resolution optics, pinpoint liquid dosing and precise sample positioning to create powerful, reliable measuring systems. The premium model OCA 50 is a fully automatic contact angle meter. It is suited perfectly to investigate the wettability of solid surfaces and determine their surface energy. Complete measurement sequences from dosing and sample positioning to parameter analysis can be programmed according to the operator’s own specifications. The measurement sequences can be played repeatedly without manual intervention and thus meet highest reliability standard for measurement results. A special variant of the device enables measurements even on large 12″ wafers. Measurements: - static contact angle - dynamic contact angle - interfacial and surface tension - surface energy - viscoelastic modulus - work of adhesion

The optical contact angle meters of the OCA series are high-precision measuring systems for the characterisation of interfaces and surfaces. They combine high-resolution optics, pinpoint liquid dosing and precise sample positioning to create powerful, reliable measuring systems. The special model OCA 25-PMC is based on the OCA 25 standard model. With its high-pressure measuring chamber, the special model OCA 25-PMC offers the possibility of carrying out measurements of interfacial tensions and contact angles under high-pressure of up to 750 bar and at temperatures between -30 °C and 200 °C. This makes the OCA 25-PMC the ideal solution to investigate, for example, the interfacial tension between a surfactant solution and crude oil in reservoir conditions. It is also possible to determine the contact angle, for example, between rock, oil, and surfactant solution.

The optical contact angle meters of the OCA series are high-precision measuring systems for the characterisation of interfaces and surfaces. They combine high-resolution optics, pinpoint liquid dosing and precise sample positioning to create powerful, reliable measuring systems. The OCA 25 standard model is the all-purpose system for contact angle measurements and drop shape analysis. The high-performance camera makes it possible to measure contact angles even on adsorbent surfaces such as tissues or powders. Compared to the entry-level OCA 15, additional measurements at temperatures of up to 700 °C are possible. Further advantages are the more precise positioning of the sample table as well as the compatibility with many more dosing systems, which allow electronic dosing and droplet volumes down to a minimum of ten nanolitres. Measurements: - static contact angle - dynamic contact angle - interfacial/surface tension - surface energy - viscoelastic modulus - work of adhesion

The optical contact angle meters of the OCA series are high-precision measuring systems for the characterisation of interfaces and surfaces. They combine high-resolution optics, pinpoint liquid dosing and precise sample positioning to create powerful, reliable measuring systems. The expert model OCA 200 is the contact angle measuring instrument for microscopic and macroscopic structures. Thanks to the 10x zoom lens and the autofocus system, the OCA 200 is suitable for any sample size from the macroscopic silicon wafer to the microscopic metal struts of a coronary stent. Together with the PDDS picolitre dosing system, the OCA 200 allows the analysis of droplets with a minimum volume of up to 30 picolitres. Measurements: - static contact angle - dynamic contact angle - interfacial and surface tension - surface energy - viscoelastic modulus - work of adhesion

The tensiometers of the DCAT series are measuring instruments for force-based investigation of surface and interface properties. Because of the compact and modular product design of the DCAT series, a bespoke combination of device and accessories can be found for any use case. The DCAT 25SF single-fibre tensiometer contains a high-precision weighing system with a resolution of up to 0.1 μg. This enables measurements even on single carbon or glass fibres. Measurements can be carried out at defined humidity and at temperatures between -15 °C and 135 °C. In addition is it possible to investigate the viscoelasticity of monolayers. Furthermore, concentration series for determining the critical micelle concentration (CMC) can be automatically generated and measured. Measurements: - surface and interfacial tension - liquid density - dynamic contact angles - surface energy of solids - determination of the CMC - surface pressure - viscoelasticity of monolayers