Bubble Pressure Tensiometer Pro Line T15+

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About Bubble Pressure Tensiometer Pro Line T15+

The SITA Pro Line T15+ is an all-round bubble pressure tensiometer for analysing surfactants and measuring dynamic surface tension. The instrument has a comprehensive bubble lifetime range from 15 ms to 20,000 ms for measuring dynamic surface tension and will automatically adjust the chosen bubble exactly without readjustment by the operator.

Using patented, cutting edge technology, the instrument is developed from the maximum bubble pressure technique to provide fast and reliable dynamic surface tension, hydrostatic pressure, effective adsorption time, bubble lifetime and dead time measurements, making it the instrument of choice when studying, controlling and developing a wide range of processes e.g. surfactants, ink jet printing, coating technologies, foam and emulsions, detergents, pharmaceuticals, cosmetics, food technologies, environmental monitoring etc.

The measuring data can be stored in the tensiometer, transferred to a computer or printed and the SITA-Lab Solution Software also offers visual presentation, evaluation and further processing of measuring data.

Measurement principle
Measurements are taken of the air pressure inside a capillary tube as air is bubbled through it whilst it is immersed in a liquid sample.  As the pressure increases in the capillary tube bubbles are eventually pushed out into the liquid sample, the maximum pressure is achieved when the bubble shape is hemispherical, after which the bubble quickly grows and leaves the capillary. The force exerted on the bubble is determined by the surface tension of the liquid. More detailed investigation of liquid properties can be achieved by monitors bubble lifetime and dead time.

The Bubble Tensiometer Pro Line T15+ measures:

  • Auto-Mode: For analysing the dynamic behaviour of the surface tension of surfactant containing liquids. Wetting characteristics of surface active liquids can also be analysed and the optimal bubble lifetime for the concentration control can be easily determined by the operator.
  • Single-Mode: Gives the user a quick measurement of a single surface tension value at a pre-determined bubble lifetime for a reliable control of the surfactant concentration of process liquids.
  • Online-Mode: Used for a continuous monitoring of process liquids and for determining the temperature dependency of the surface tension of liquids.


ProLine T15+ Bubble Tensiometer Carry CaseAuto-Mode: Automatic scan over dynamic range of 15ms to 20s

  • Automatic scan of bubble lifetimes
  • For research & development
  • Surfactant kinetics
  • Wetting behaviour
  • Comparative analysis

Single-Mode: Easy measurement for fast quality control

  • Pre-parameterised single-point measurement
  • For fast quality control
  • Cleaning
  • Galvanic bath
  • Semiconductor production
  • Inks & paints

Online-Mode: Analysis of time-dependent effects

  • Continuous long-term measurement with constant bubble lifetime
  • Sample stability
  • Dissolving behaviour
  • Temperature effects

Paired with the intuitive SITA Lab-Solution software the Pro Line T15+ bubble tensiometer additionally offers users

  • Comfortable report function for creating measurement protocols and reports
  • User-defined sequences for recurrent measuring and controlling tasks (templates)
  • Automated laboratory measurement and active ingredient analysis
  • Controlling accessories for sample preparation and conditioning
  • Determination of concentration curves


Surface Tension
Measuring range (mN/m) 10 to 100
Resolution (mN/m) ± 0.1
Bubble Lifetime
Adjustable range 15 ms – 30,000 ms
Resolution 1 ms
Control deviation adjustable, 1 to 10%
Measuring deviation max. 1ms
Sample Temperature
Measuring range 0 to 100 ° C
Resolution 0.1 K
Power Supply
USB power supply 100-240V / 5V
Battery (Li-Ion, integrated) 3.6V/1,950 mAh, min. 10h operating time
Max. power consumption 2.5W
Interface, Storage, Dimensions, Weight
USB-Interface data transfer and device operation
Display 124 x 168 pixel, illuminated
Storage SINGLE/AUTO: 25 spaces; ONLINE: 6 mio
Dimensions (WxHxD) 75 x 168 x 35mm
Weight of instrument 270g

All Downloads

Filename Size Download
SITA Pro Line T15+ Bubble Pressure Tensiometer Brochure 1.26MB Download

Ordering Information

Part Number Description
G71-000010 SITA Pro Line T15+ Bubble Tensiometer
G02-000019 SITA-LabSolution Basic Version Software
G02-000021 SITA-LabSolution Expert Version Software
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

Packing List: Pro Line T15+ Bubble Tensiometer; carrying case, capillary PEEK (2 pieces) power supply, USB-cable, stand and instrument fastener, sample vessel (2 pieces), operating instructions & calibration certificate.

  • Last updated: June 2024
  • Version: 1.0

Statements, technical information and recommendations contained herein are based on tests we believe to be reliable but they are not to be construed in any manner as warrantees expressed or implied. The user shall determine the suitability of the product for his intended use and the user assumes all risk and liability whatsoever in connection therewith.