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Krüss DSA25

  • Budget-friendly instrument design
  • High-quality optics, 6.4-fold zoom, high resolution camera 79 fps up to 301 fps
  • Contact angle by standard drop shape analysis
  • 1 or 2 software-controlled direct dosing systems, glass or disposable syringes
  • Optional measurement of sample and environmental temperature

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The precision basic instrument for wetting investigations

Drop Shape Analyzer - DSA25 is an easy-to-use, reliable instrument for measuring contact angle. From a simple wetting test to the accurate measurement of surface free energy (SFE), the robust instrument provides flexible options for analyzing wetting and adhesion on solid surfaces. Its rapid, manual operation makes our DSA25 outstandingly suitable for occasional wetting measurements with changing tasks and sample types.

Well-conceived details for reliable measurement
The uniform lighting and high-quality optical components ensure that the dispensed drop is portrayed with the correct shape, and that the contact angle is measured reliably. The sample is quickly moved to the required measuring height using our finely adjustable lift table. The table can be easily moved and the required dosing position quickly set thanks to the magnetic fixing.

With dosing units for one or two liquids, the instrument is suitably equipped for simple wetting tests or for measuring surface free energy. With the software-controlled variant, the dosing dynamics can be accurately adjusted in order to make exact measurements of advancing and receding angles. As an alternative, our pressurized double-dosing unit allows measuring the SFE extremely fast and reliable, using our novel, scientifically validated dosing technique, the Liquid Needle.

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Specifications

Specifications

Camera system
CF03
150 fps at 1200 × 1200 px
500 fps at 1200 × 350 px
800 fps at 1200 × 200 px
2000 fps at 1200 × 60 px

CF06
Up to 3400 fps at 640 × 50 px

Optics
Focus: Manual
View angle: ±3°

Zoom
fixed focal length
6.5× zoom, manual
6.5× zoom, manual

Sessile drop/captive bubble
Result: Contact angle (CA)
Range: 0 to 180°
Resolution: 0.01°
Accuracy: 0.3° 

Surface free energy of solids
Result: surface free energy (SFE)

Pendant drop/rising drop
Result: Interfacial tension (IFT)/surface tension (SFT)
Range: 0.01 to 2000 mN/m
Resolution: 0.01 mN/m
Accuracy: 0.3 mN/m

Sample dimensions
Maximum sample spacel: 320 (w) × ∞ (D) × 165 (H) mm

Temperature control
Devices: Temperature-controlled sample stage, chambers, cuvette
Type: Liquid, Electrical, Peltier
Range: -30 to 400 °C
Maximum sample size: 132 (W) × 132 (D) × 27 (H) mm
Resolution: 0.1 K
External circulator: With liquid
Inert gas: Yes

Temperature measurement
Range: -50 to 400 °C
Resolution: 0.1 °C
Precision: 0.1 °C
Accuracy 1/3 DIN B (±0.1 °C at 0 °C to ±0.8 °C at 400 °C)
External sensor: 2 connectors (PT100)

Dimensions
610 (W) × 250 (D) x 430 (H) mm

Weight (without accessories)
10 kg

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