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Page 36 AR-G2/AR 2000ex/AR 1500ex Getting Started Guide
Accessories
The sections below briefly describe the AR Rheometer accessories.
Bicone Interfacial Accessory
The bicone interfacial accessory is mainly used to determine the viscosity of the interface between two liq-
uid phases. The stator is a circular cup with removable lid, the geometry is a thin, biconical disc. For
chemical inertness, and to reduce the meniscus effect, the cup and lid are constructed from poly (tetrafluo-
roethene), PTFE, and the geometry from stainless steel. It is important that the cup and disc are aligned
concentrically, and the base with Smart Swap
TM connector into which the cup sits has been designed to
ensure this. Normally, the cup should be exactly half filled with the more dense sample fluid, and filled to
the top with the less dense fluid. The disc is placed at the interface of the two fluids. A mark has been
lightly inscribed on the inside of the cup to indicate when it is half full.
Figure 15 Bicone Interfacial Accessory.