Kyowa Interface Japan started manufacturing Surface Tensiometer since 1957.
The DyneMaster Tensiometer series starts with model DY-300 and he most sophisticated model would be DY-700. 
Measurement technique used in Kyowa Tensiometer are Wilhelmy plate method ,du Noüy ring method, Pendant drop method and Maximum bubble pressure method
Instrument is widely used in Paint industry, ink, Rubber , Pharma ,Ceramic, Nano & polymer and Research institutes etc
The same instrument is also used for the measurement of IFT - INTERFACIAL TENSION. This is mostly used in the study of quality of Transformer Oil.
When IFT is measured the system is delivered with DuNuoy ring and a bigger sample receptacle with graduation