What are the special considerations for interface measurement?
The 3302 can measure both level and interface and the 3301 can measure the interface with fully immersed probe. However, for interface measurement a few criteria have to be fulfilled: • The dielectric of the upper product must be known and should not vary. • Upper product dielectric < Lower product dielectric • Difference between dielectrics > 10 • Thickness of upper product > 10 cm (4 in.) for coax, rigid twin and rigid single probes and 20 cm (8 in) for flexible twin probes in order to be detected • The max measuring range is limited by the upper product dielectric constant • Coaxial, Twin probes or rigid single can be used • Max upper product DC is 5 for twin lead probes and 10 for coaxial probe Target applications include interfaces between oil/oil-like (DC<3) and water/water-like liquids (DC>20). Consult factory regarding other interface applications and when emulsion layer! Note that in order to use the 3301 for interface applications the probe has to be fully immersed at all tim
