New Developments 1/1/17

A new generation of bubble pressure tensiometers, including BPA-2P and BPA-2S , as follow up developments of the excellent predecessors BPA-1P and BPA-1S , are available more...

New Books 1/1/17

Textbook “Dispersionseigenschaften - Stabilität, 2D-Rheologie, 3D-Rheologie“ This textbook contains the main fundamental knowledge on interfaces, colloidal systems more...

Latest events 1/1/17

2D-3D Rheology and Stability of Disperse Systems - User Workshop, May 8-10, 2017, Berlin-Schönefeld, Germany In May 2017 the 2D-3D Rheology and Stability of Disperse more...

Maximum Bubble Pressure Tensiometer BPA2S


New developments based on modern hardware and software design expands the instrument’s usability and measurement performances.

New improved compact mechanics increases significantly the reliability and stability of the instrument. True real time measurement, open hardware architecture for integration of instrument to complex systems, ethernet connection, versatile user interface

- direct and precise measurement of dead time and life time
- surface tension as function of physical time and life time
- available time interval of 5 orders of magnitude (0.001 s to 100 s)
- precise measurement of correct dynamic surface tensions
- direct determination of the hydrostatic pressure via automatic capillary immersion
- easy customized experimental protocols - set modes of measurement for different requrement
- correction of hydrodynamic and viscosity effects of a measurement liquid
- continuously temperature monitoring of the sample
- hardware external bus for instrument integration into lab measurement systems - new modern design with accurate high resolution color capacitive touch display - external large format LCD connected direct to instrument - user interface  via touch or keyboard/mouse
- optional software control via Ethernet for system integration
- instrument can be directly integrated into local network environment with internet
access and automatic software update

Instrumental parts
User interface provided touch screen functionalities and optional possibilities to use external mouse/keyboard connected with the instrument via
USB port, at the same time user interface may be use  large external LCD, connected direct to instrument.   The BPA2S uses modern high quality electronic and
mechanic components. This results in a better measurement
accuracy and measurement stability.

The instrument allows the following measurements
- surface tension of liquids
- density estimation

Main features of the software
BPA2S operated as stand-alone instrument. All instrument’s functions are supported without external PC connections. As user interface a touch screen provides functionalities and optional possibilities to use external mouse/keyboard connected with the instrument via USB port. USB-2 interface allows storing the measurement data on a USB. An Ethernet interface allows connection of the instrument directly to a local net. The instrument control from a PC via local net or internet is possible.

Technical Specifications

Technical Specifications

Range of surface and interfacial tension 10 to 150 mN/m
Resolution ± 0.005 mN/m
Accuracy of surface tension measurement better than 0.5 %
Dynamic time range: Standard capillary 10 ms to 20000 ms
Special capillary 0.1 ms to 100000 m s
Accuracy of density measurement 2 %
Display Graphic color TFT touch display 7’’
resolution 800 x 480 pixel
Minimum volume test liquid 1 ml
Measurement temperature range  0 – 150°C
Experimental time: Standard mode: 20-30 min
Fast mode: 4-6 min
Operation system Windows Embedded standard WES7
Firmware free update over 1 year after purchase, update via Internet
Measurement Mode
- Standard
- Constant time
- Fast Scan
- Increasing flow
- Density estimation
- Viscosity estimation
- Custom mode
Opereation mode Stand-alone (touch display, mouse, keyboard) or via VNC-client
Data storing:

built-in SSD 64 GB
USB Memory stick
network storage
Interface 1 x Ethernet
3 x USB 2.0 / 1 x USB 3.0
WiFi (option)
DisplayPort (DVI/HDMI) res. up to 1920x1200
Process control option              Hardware 10 bit data bus
Enviroment temperature                         10 - 50 °C
Dimensions Measurement unit / Tripod 300x400x350 mm
Weight Measurement unit 5 kg
Power requerment:       Measurement unit 24 VDC
Power supply, external                          100 … 240 AC;  to 24 VDC
Max. power consumption                    15 W
Extra accessories                        capillaries of different diameters