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The compact and flexible Allround-Tensiometer

Process parameter surface tension for monitoring the concentration of surfactants and solvents

Single-Mode - Quick control of surfactant concentration

Quick and reliable for control tasks.
The device displays a single measuring value at pre-determined parameters.

Auto-Mode - Optimal support for R&D

Optimal for the analysis of processes and chemicals.
Test measuring range, number of data points and averaging of measured values can be set individually.

Online-Mode - Easy process monitoring

Continuous monitoring of manufacturing processes as well as automatic measurement of temperature dependencies.
User can easily adjust the measurement parameters.


SITA pro line t15 brochure


Tensiometer SITA pro line t15

Product description

Measuring the surface tension - compact and flexible

The SITA pro line t15 is an all-round talent among bubble pressure tensiometer. The measuring device has a comprehensive bubble lifetime range from 15 ms to 20 s which covers a wide concentration range from several grams to a few micrograms of surfactant in 1 liter process solution. The dynamic curves of surface tension of surfactant-containing chemicals can be used to characterize wetting behaviour or to determine the optimal bubble lifetime for concentration monitoring.

Quick measurement of a single surface tension value at a pre-determined bubble lifetime
Reliable control of the surfactant concentration of process liquids
Determining temperature dependencies of the surface tension of process liquids
Continuous process monitoring , e.g. with the SITA Process Interface (Accessories)
Analysis of the dynamic surface tension behaviour of surfactant containing liquids
Analysis of the wetting characteristics of surface active liquids

Easy and secure determination of the optimal bubble lifetime for concentration control by the operator

Measuring data can be stored in the 3 storage arrays of the SITA pro line t15 They can be transferred to a computer or printed with the optional protocol printer (accessories). The graphical evaluation of the measurement results and data export can be managed using the optional software SITA-LabSolution.

Feature Benefits of the SITA proline t15:

Three modes (single, auto and online) - Adapted to the special measurement tasks
Easy and direct start of a measurement
Regulates surface age (bubble lifetime) automatically - no drift and manual work required
Pre-set parameters reliably prevent measuring deviations through incorrect use
Measuring values can be compared with all SITA tensiometer



Determining the optimal bubble lifetime for a control of surfactant concentration

The picture shows the procedure of how to determine the optimal bubble lifetime for monitoring the concentration of a wetting agent.

After measuring the dynamic surface tension of samples with different surfactant concentration in the Auto-Mode, the optimal bubble lifetime is chosen to be the maximum difference between surface tension values of the concentration range to be monitored.


Analysis of the temperature behavior of process chemicals

in the Online-Mode for determining the temperature compensation for monitoring the surfactant concentration.


Continuous process monitoring

in the Online-Mode for the documentation of process development.


Quick measurement of surface tension

for quality control and concentration control.

Here you can find application examples [..]

For your security

Our application engineers advise you, if you can use the SITA pro line t15 for application and how to.

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...).


Laboratory automation with the new Windows-Software SITA-LabSolution

Automation of laboratory measurements with a wide range of accessories for analysing active ingredients
Intuitive operation ensures efficient preparation of experiments and
evaluation of measuring results
Easy access to all functions of the tensiometer
Report function for creating measurement protocols and reports

Controlling a wide range of accessories

Burette (fluid dosing unit)



Magnetic stirrer, (heating) stirrer




easy manual cleaning for paints and varnishes


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 pro line t15


Technical Data

Surface Tension
Measuring range 10 - 100 mN/m (dyn/cm)
Resolution 0.1 mN/m (dyn/cm)
Bubble Lifetime
Controlled range 15 ms - 20,000 ms
Resolution 1 ms
Liquid Temperature
Measuring range 0 - 100 °C
Resolution 0.1 K
Power Supply
Mains adapter 100 - 240 V
47 - 63 Hz
Battery (Lion, integrated) 3.6 V/1,950 mAh
Max. power consumption 2 W max.
Interface, Storage, Dimensions, Weight
USB-Interface data transfer, power supply & charging of battery
Display 124 x 168 Pixel, illuminated
Storage 3 memory areas for Single, Auto and Online measurements
Dimensions (WxHxD) 75 x 168 x 35 mm
Weight of instrument 270 g

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A business unit of SITA Messtechnik GmbH.

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