The optical contact angle meters of the OCA series from DataPhysics Instruments 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.

OCA15 EC entry-level contact angle meter

The entry-level model OCA 15EC enables basic methods of professional contact angle measurement and drop shape analysis. Thanks to the modular construction, even this entry-level model can be combined with many accessories, such as the TBU 100EC tilting unit.

OCA 25 standard contact angle meter

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 15EC, additional measurements at higher 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.

OCA 50 premium contact angle meter

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. Since the sample stage is electronically adjustable, 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 standards for measurement results. A special variant of the device enables measurements even on large 12″ wafers.

OCA 200 expert contact angle meter

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 down to 30 picolitres.

Possible Measurements:

• static contact angle (sessile drop method, captive bubble method, sessile drop in top view)

• dynamic contact angle (roll-off contact angle and needle-in method)

• analysis of interfacial and surface tension with dispersive and polar parts (pendant drop method)

• analysis of surface energy with dispersive and polar parts (sessile drop method; manual or automatic measuring procedure with several test liquids, depending on model)

• analysis of the viscoelastic modulus (oscillating drop method)

• analysis of the work of adhesion

Features of contact angle meters of the OCA series:

• sample table either with magnetic base for horizontal position, adjustable in all three directions with high-precision mechanics or electronic axes, depending on model

• high-performance camera with up to 4276 frames/s and USB 3 interface, depending on model

• fast lens with 6,5-fold to 10-fold zoom, depending on model

• stepless focus and adjustable observation angle, manually or automatically depending on the model

• LED-lighting with manual and software-controlled intensity including automatic temperature drift compensation

• TP 50 control panel with touch screen and precision control wheel, included in OCA 50 and OCA 200

• compatible with the SD-DM single direct dosing system with one electronic syringe module

• compatible with the DD-DM double direct dosing system with up to two electronic syringe modules

• compatible with FDDS Flexdrop dosing system, which can dose two drops simultaneously with a minimum volume of 25 picolitre

• compatible with electronic multiple direct dosing systems DDE with up to four electronic syringe modules (OCA 25 and higher)

• compatible with the nanolitre dosing system, which can dose drops with a minimum volume of 10 nanolitres (OCA 25 and higher)

• with the PDDS picolitre dosing system, which allows minimum drop volumes of about 30 picolitres (only OCA 200)

• upgradeable with different environmental chambers for measuring at temperatures ranging from -30 °C up to 700 °C, depending on model

• upgradeable with the TVS TopView Video System, which allows the measurement of contact angles in indentations

• upgradeable with the manual tilting table TBA 360 and the electronic tilting unit TBU 100

• upgradeable with a humidity generator of the HGC series from DataPhysics Instruments (OCA 25 and higher)