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The simplest of the precise


The mobile hand-held tensiometer measures the surface tension as well as the surfactant concentration easily and quickly in the laboratory and at the production line. It shows the measured values directly on the comfortable display and alerts when set limits are exceeded or not reached - for process monitoring and quality control.


• Small, light and mobile without PC or laptop

• Battery capacity up to 10 h

• Practical case for transport and storage



• Simple measurement at the touch of a button

• Fast control of surface tension

• Capillary optimised for process use



• Display of surfactant concentration with range limits

• Measured values can be compared with other SITA tensiometers

• 25 measuring profiles for tasks from bath control to process documentation



Surface tension in mN/m

Fields of application

Measuring the surface tension of liquids at the plant or in the laboratory

Control of surfactant concentration

Comparative analysis of surfactant-containing products


25 measuring profiles for managing the measuring tasks

Robust housing and optional acid protection

Easy rinsing and calibration with water


Capillaries for process use made of PEEK, PTFE or glass

Independent of immersion depth due to differential pressure method

Automatic control of the parameter bubble lifetime

Measurement monitoring

Water (DI) as calibration standard


Industrial parts cleaning, electroplating, paints & lacquers, inkjet inks and many more


      SITA tensiometers have been in use for over 25 years for these applications, among others:

      Control of surfactant concentration in cleaning and rinsing baths in industrial parts cleaning
      Monitoring of the wetting agent concentration in galvanic coating and etching processes
      Measuring the surface tension of liquids at the plant (atline) or in the laboratory (offline)
      Quality testing of ink-jet inks as well as paints and varnishes

      Incoming and outgoing inspection of surfactant-containing products

      Mobile use in the field and in the production area

      SITA application consulting develops measurement methods and control procedures for individual use in close consultation. This includes free trial measurements, characteristic curves, rental positions and consultations remotely or on site.

      More application examples here

      Measuring principle

      Like all SITA tensiometer, the SITA pro line t15 is based on the bubble pressure method for measuring the dynamic surface tension of liquids.

      The principle of the bubble pressure method is, that an air stream is lead through a capillary into the process liquid. A sensor measures the pressure which is needed to generate a bubble (mehr...).

      Technical data

      Surface tension
      Measuring range 10...100 mN/m (dyn/cm)
      Resolution 0.1 mN/m (dyn/cm)
      Bubble lifetime
      Adjustable range 15...20,000 ms
      Resolution 1 ms
      Max. regulation deviation
      5 %
      Max. viscosity 2,000 mPas
      Sample temperature
      Measuring range 0...100 °C
      Resolution 0.1 K
      Measuring range, unit User defined
      Power supply
      USB power supply 100...240 V / 5V
      Li-Ion battery

      3.6 V / 1,950 mAh, min. 10h operating time

      Max. power consumption
      2.5 W
      Interface, storage, dimensions, weight
      USB-Interface Data transfer
      Display LCD, illuminated
      Number of measurement profiles 25
      Storage 25 memory locations per profile
      Dimensions (WxHxD) 75x168x35 in mm
      Weight 260 g


      The Windows software SITA-ProcessLog allows an easy control of all functions of the tensiometer with the PC as well as a comfortable management of the saved measuring data.

      Management and graphical analysis of saved measuring data
      Documentation and evaluation of the process and products‘ characteristics
      Simple and easy preparation of measuring reports
      Controlling the measurement via PC in the laboratory
      Simple generation of concentration curves based on defined samples



      Type I PEEK

      easy manual cleaning for paints and varnishes

      Type II PEEK

      for monitoring process liquids

      Type III Glass

      for agressive liquids

      Disposal capillaries PTFE

      for special cases

      Device protection

      Acid protection kit

      PE jacket for sensor head or device, borosilicate glass protection for temperature probe, glass cover

      Sample handling

      Sample vessels 50 ml

      Mini sample vessels - 5 ml

      for measuring very small sample volumes

      Double walled glass vessel

      for use with thermal liquid circulator (thermostat) including special cover and insulation

      Laboratory devices

      Heating plate with magnetic stirrer and stand for SITA DynoTester+


        Scope of delivery

        • Measuring device SITA DynoTester+

        • Robust suitcase

        • 2 Capillaries PEEK type II or others depending on application

        • Power supply

        • USB-cable

        • Stand

        • Device holder

        • 2 Sample vessels 50 ml

        • Manual

        • Short manual

        • Calibration certificate


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        A business unit of SITA Messtechnik GmbH.

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