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+++ Product update and modification +++

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

• 50 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


50 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

Independent 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

Mobile use in the field and in the production area

Incoming and outgoing inspection of surfactant-containing products

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 DynoTester+ 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. (more...).

Technical data

Surface tension
Measuring range (10...100) mN/m (dyn/cm)
Resolution 0.1 mN/m (dyn/cm)
Bubble lifetime
Adjustable range 15...30,000 ms
Resolution 1 ms
Max. regulation deviation
5 %
Measuring deviation
max. 1ms
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 / 2,000 mAh, min. 10h operating time

Max. power consumption
2.5 W
General data
USB-Interface Data transfer and device operation
Display LCD, illuminated
Number of measurement profiles 50
Storage 1,000 readings per profile

Acceptable ambient temp.


(-20...50) °C / (10...40) °C
Measuring gas Ambient air
Dimensions (HxWxD) 168x75x35 in mm
Weight 270 g


The Windows software SITA LabSolution 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 individual concentration curves




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 DynoTester+


Scope of delivery

• Measuring device SITA DynoTester+

• Robust suitcase

• 2 Capillaries PEEK type 2 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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