SITA Dynotester Tensiometer

Dynotester/Dynotester Plus

Portable Bubble Pressure Tensiometer



The DynoTester couples accuracy and speed for dynamic surface tension measurements at many different bubble lifetimes. It can be operated handheld or as a tabletop instrument for your convenience. Software is additionally available for auto-data collection.  Dynamic surface tension measurement is available for any liquid used in all fields including: electroplating, environmental, biological, personal care, household cleaning, semi-conductor etching/photoresist liquids and etc.  It has time-saving and accurate operation in addition to its portable or stationary function for maximum efficiency and efficacy.  It can work with a special process software module, SITA ProcessLog, to make it even more efficient.   


Display of surfactant concentration within defined limits

Comparability of measuring values with all SITA lab and process measuring devices

Adjustable high dynamic bubble lifetime range: 15 ms…20.000 ms


Patented and optimized capillary for process use

Robust device housing for atline measurement

Comfortable suitcase for transport and device storage, also useful as working surface


Intuitive operation: simple and fast measuring as well as controlling

Mobile hand-held tensiometer: no PC or notebook required

25 measuring profiles for bath control, process documentation and more



User-friendly features:

  • Portable/handheld device
  • Regulates surface age automatically
  • Quick measurements
  • Easy to operate
  • Interchangeable capillaries
  • Saves multiple measurements
  • Three programmable soft keys
  • Automated calibration
  • Touch key menu access for selection of operation mode, calibration and clean mode
  • Calibration against water

Allows measurements either at:

  • Constant surface age (bubble lifetime)
  • Automatically increasing surface age (bubble lifetime)
  • Measurement independent of immersion depth
  • Ease of switching among samples
  • No density value of sample needed to be entered prior to measurement.


Max Bubble Pressure Method

Technical Data – SITA DynoTester:

  • Surface Tension:
    – Measuring Range: 10 – 100 mN/m (dyne/cm)
    – Resolution: 0.1 mN/m (dyne/cm)
  • Bubble Frequency:
    – Controlled Range: 0.01 – 10 Hz
    – Accuracy: 3 digits
  • Bubble Lifetime:
    – Measuring Range: 15ms – 20s
    – Resolution: 1 ms
  • Sample Temperature:
    – Measuring Range: -30° to +130°
    – Resolution: 0.1°
  • Memory: 25 Measurement Storage
  • Power Supply: 100-240 V / 47-63 Hz
  • Batteries: 4x AA (1.5V)
  • Max. Power Consumption: 2W
  • Weight: 250 g

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