DT hCe dAT25SF
ynamic contac t angle measuring
instrument and tensiometer		for single f ibres

single fibre holder
FH 12 and FH 13plate holder PSH 11

Wilhelmy plates PT 11/9 andcylindrical plate PT 10

Langmuir trough module LTM
with Langmuir trough LT-S

DCATS 31 — determination of the surface tension with the Du Noüy ring method

The dynamic contact angle measuring instrument and tensiometer DCAT 25SF is a
special variant of the DCAT 25. It includes
a balance with even higher accuracy toprovide a resolution of up to 0.1 μg during
measurements with single fibres.
Please note that the high resolution
balance requires a vibration free environment.
Due to state-of-the-art electronic
components the DCAT 25SF features anespecially fast and precise motor as well
as automatic crash protection and canbe controlled intuitively with the TP 50
control panel.

Software for efficient work
The newly developed, Windows® based,
DCATSoftware is available in various independently usable modules, and is operable either traditionally, using mouse andkeyboard, or on multi- touch notebooks/
pads by finger/pen. The available softwaremodules for the DCAT 25SF are:
DCATS 31 — surface/interfacial tension• determination of the surface and interfacial tension according to the Du Noüyring and the Wilhelmy plate method

determination of the contact angle hysteresis on a single fibre in a DCAT 25SF with TP 50 control panel

measurement with a single fibre on the single
fibre holder FH 12

Main features of the DCAT 25SF
• high-precision electrodynamic compensation weighing system with automaticand manual calibration, designed formeasurements with single fibres andmax. resolution of 0.1 µg• software-controlled, motor-driven
height positioning of the sample vessel
with variable speed• automatic coupling lock for the balance• automatic crash protection for measuring probes during measurement• illuminated sample chamber with inlet
for inert gas or vapor• digital thermometer with connections
for two Pt100 temperature sensors• intuitive control panel with touch screen
TP 50 for all electric components

sample vessels GS 70/50 andcover plates CP 50/70

density determination set DIS 11and Du Noüy rings RG 11/10

DCATS 32 — dynamic contact angle• determination of the dynamic contact
angle of solids (e.g. plates, films, rods
and single fibres)• analysis of the surface free energy ofsolids as well as its components according to nine different theories

DCATS 33 — CMC• automated determination of the critical
micelle formation concentration (CMC)of surfactants, using the dosing unit
LDU x/x for additive and subtractive
dosingDCATS 34 — liquid density• determination of the density of liquids
DCATS 38 — surface pressure• determination of the surface pressureof a monolayer during its compression
and relaxation in the Langmuir troughmodule LTM• kinetic measurements under isobaric orisochoric conditions to analyse dynamic
processes in a monolayer in the LTM• interfacial rheological analysis of viscoelastic monolayers in the LTM

TP 50 control panel with touch screen

Te c h n i c a l d a t a
Measuring range for surface and interfacial tensions:• 1 … 2000 mN/m; ± 0.0001 mN/m resolution

Measuring range for dynamic contact angles:• 0 … 180°; ± 0.01° resolution

Measuring range for densities:• 0.50 … 2.50 g/cm3; ± 0.002 g/cm3 resolution

Weighing range:• 1 µg … 10 g; 0.1 µg resolution; 3 µg accuracy

Measuring value rate:• up to 50 weighing values per second

Traversing range and speed of sample table:• 105 mm
• 46 nm/s … 12 mm/s

Travel resolution:• 24 nm

Balance calibration:• automatic internal and manual external with reference weights

Temperature measurement and range:• -10 … 130 °C (liquid temperature control unit TV xx)• 2 x Pt100 inputs for ‑60 … +450 °C (Pt100 optional); 0.01 K resolution;
precision 1/3 DIN IEC 751 (±0.03%), Class B

Dimensions (L x W x H):• 360 x 230 x 575 mm3Weight:• 24 kgPower supply:• 100 … 240 VAC; 50 … 60 Hz; 70 W

The high degree of accuracy of the DCAT devices complies with all related international standards, for example:• ISO 6295 Petroleum products -- Mineral oils -- Determination of interfacial tension of oil against water -- Ring method• ISO 6889 Surface active agents -- Determination of interfacial tension by drawing up liquid films• ASTM D971 Standard Test Method for Interfacial Tension of Oil Against Water by the Ring Method• ASTM D1417 Standard Test Methods for Rubber Latices—Synthetic• DIN EN 14210 Surface active agents - Determination of interfacial tension of solutions of surface active agents by the stirrup or ring method• ASTM D1331 Standard Test Methods for Surface and Interfacial Tension of Solutions of Paints, Solvents, Solutions of Surface-Active Agents, and Related Materials• ISO 304 Surface active agents -- Determination of surface tension by drawing up liquid films• ISO 1409 Plastics/rubber -- Polymer dispersions and rubber latices (natural and synthetic) -- Determination of surface tension by the ring method• OECD 115 OECD Guidelines for the Testing of Chemicals: Surface Tension of Aqueous Solutions

A c c e s s o r i e s (excerpt)liquid temperature control unit for sample vessels with diameters of 50 mm (TV 50) and 70 mm (TV 70) with integrated Pt100 probe; available as a non-magnetic version TV 70NM with a removable microelectronic stirrer • automatic dosing and refill system LDU x/x • sample vessels made of glass GS xx and PTFE GS xxP as well as cover plates CP xx • Du Noüy rings RG 11/10 • Aligning tool R-AT • Wilhelmyplates PT 11/9 • cylindrical plate PT 10 • density determination set for liquids DIS 11 • single fibre holder FH 12 and FH 13 • plate holder PSH 11• glue for FH 12 and FH 13 Glue FH 12 • Langmuir trough module LTM • Langmuir troughs LT-S/LT-I • Ioniser for sample chamber MCI 12

F o r m o r e i n f o r m a ti o n ab o u t a t ai l o r- m a d e s o lu ti o n
to yo u r su r f a c e c h e m i s tr y r e q u i r e m e n t s ,please contact us.
We w ill b e p l e a s e d to p r o v i d e a q u o t a ti o n ,o b l i ga ti o n f r e e , f o r yo u r i n s tr u m e n t s y s te m .
DataPhysics Instruments GmbH • Raiffeisenstraße 34 • 70794 Filderstadt, Germany
phone +49 (0)711 770556-0 • fax +49 (0)711 770556-99
sales@dataphysics.de • www.dataphysics.de

Yo u r s al e s p ar tn e r:

Technical information in this document is subject to change without prior notice. Errors and omissions excepted.
© Copyright by DataPhysics Instruments GmbH, Filderstadt.
is a registered trademark of DataPhysics Instruments GmbH DS/DCAT 25SF-1702 – 1.1/En
Photos by Norbert Heil, Thomas Müller, Bavaria, Tony Stone, Dreamstime, S. Gorb Uni Kiel, DataPhysics archives. Artwork and layout: Daniel MaierStandards