Wilten Instruments has a wide range of instruments. Because of the variety of options on some products we are not able to mention all of them on our website. Complete information is available on demand.
Mon - Fri: 8:30AM - 5:00PM
+ (31) 076 508 65 00


Home  /  Tensiometers  /  DeltaPi-4x

Four channel tensiometer

Developed for studying interactions in biological systems.

DeltaPi series of Langmuir-tensiometers allow you to detect the penetration of drugs, peptides/proteins and nucleic acids into monolayers of specified lipid composition and at precisely controlled lateral packing density. The volume of the magnetically stirred subphase is minimally 150 microliters, which keeps your material consumption very low. One milligram of an antimicrobial peptide, for instance, is sufficient for a comprehensive characterization of its lipid-binding properties. Further, the choice of materials eliminates unwanted non-specific surface effects.

DeltaPi is a single-channel model, while DeltaPi-4 is equipped with four parallel microbalances, increasing significantly the throughput of experiments. When you are in a hurry and need to generate data fast, DeltaPi-4 is your choice. Both instruments measure surface tension with Kibron’s thin wire probes (DyneProbes) from small subphase volumes. They are compact and have an open and robust construction, easy to clean and maintain, operated with our intuitive software, DeltaGraph.


Principle Wilhelmy method using a small diameter ( 0.51 mm) special alloy wire. No artefactual hysteresis as when using the conventional Pt-plates. No drying and accumulation of salt which cause significant errors when filter paper is used. The DeltaPi-4 is equipped with four parallel sensors.
Dynamic range 0 to 300 mN/m
Resolution 10 µN/m
Temperature sensor Automatic monitoring and display of temperature in the course of the experiment, resolution 0.1 °C (optional feature)
Volume 1 ml in surface pressure measurements. Subphase can be magnetically stirred.