DCAT 25 Tensiometers

The DCAT 25 Tensiometers is the multifunctional all-round instrument of the DCAT series. The weighing system is even more precise than that of the DCAT 9 and 15 and hence offers highest accuracy for the determination of surface and interfacial tension. A completely closed sample chamber enables measurements under inert gas or ionised atmosphere as well as with controlled relative humidity.

Due to the longer travel distance of the sample stage, an electrical temperature control unit can be mounted inside the DCAT 25 which makes measurements at temperatures of up to 300 °C possible. Moreover the Langmuir trough module can be used to investigate the surface pressure and the interfacial rheology of monolayers. The upgrade video system provides the opportunity to record video-sequences during force of adhesion measurements and to evaluate contact angle, contact area etc. in addition to the force. The optional TP 50 control panel with touch screen and precision control wheel is recommended ensures an intuitive and fast device control even during complex measurements.

Features DCAT 25 Tensiometers

• high resolution electrodynamic compensation weighing system with automatic and manual calibration function
• software controlled, motor-driven height positioning of the sample receptacles with variable speed
• automatic coupling lock for the balance
• automatic crash protection for measuring probes during measurement
• closed illuminated sample chamber
• integrated magnetic stirrer
• digital thermometer with connections for two Pt 100 temperature sensors
• optional TP 50 control panel with touch screen and precision control wheel is recommended
• compatible with the liquid dosing unit LDU 25
• compatible with the electrical temperature control unit TEC 25 /DCAT
• compatible with the upgrade video system UpVideo DCAT
• compatible with the Langmuir trough module LTMr

Technical Specification

Weighing range 

• 10 μg … 210 g

Resolution; accuracy 

• 10 μg; ± 20 μg

Measuring value rate [values/s]

• up to 100

Surface and interfacial tension

• ○

Measuring range

Resolution

• ± 0.001 mN/m

Ring correction options

• Huh-Mason, Zuidema-Waters, Harkins-Jordan, Lunkenheimer factor, linear, polynomial, none

Density determination

Liquid density

• ○

Solid density

• ○ 

Measuring range

Resolution

Dynamic contact angle

• ○

Measuring range

• 0 … 180°

Resolution

• ± 0.01°

Automated CMC determination 

• ○

Sedimentation and penetration 

• ○

Adhesion

• ○

Upgrade video system UpVideo DCAT

• ○

Surface pressure

• ○

pH value measurement

• ○

Sample stage

• motorised with automatic crash protection

Traversing range

• 105 mm

Traversing speed

• 46 nm/s … 12 mm/s

Travel resolution

Temperature control

via liquid circulator (-10 … 130 °C)

• ○

via Peltier element (-15 … 135 °C)

• ○

via electric heating chamber (RT…300 °C)

• ○

2 x Pt100 inputs for –60 … +450 °C ± 0.01 K

• ●

Multilingual Software

• English, German, French, Chinese

Compliance with international standards

• a comprehensive list can be found online: www.dataphysics-instruments.com/standards/

TP 50 control panel

• ○

Automatic stirrer

• ● (magnetic)

Balance calibration

• automatic internal and external with reference weights

Dimensions (L [mm] x W [mm] x H [mm])

• 360 x 230 x 565

Weight [kg]

• 23

Power supply

• 100 … 240 VAC; 50 … 60 Hz; 70 W

 

● integrated    ○ with optional software/accessory    ― not available