The Kibron Delta-Pi is a single-channel Langmuir-tensiometer. This instrument is designed for research in surface chemistry and biology, allowing for the precise measurement of surface tension and the study of molecular interactions at the air-water interface. It is specifically used to investigate the binding of molecules like drugs, peptides, and proteins to lipid monolayers, which serve as models for cell membranes. The system uses a sensitive wire probe (DyneProbe) and can work with very small sample volumes (as low as 150 microliters), making it suitable for research with valuable or scarce materials. It is a tool for creating and characterizing Langmuir films.