<P><EM>Conventional Flowmeters</EM> covers origin, principle of operation, development, advantages and disadvantages, applications, and frontiers of research for conventional technology flowmeters, which include differential pressure and primary elements, positive displacement, turbine, open channel, and variable area.</P><P>There are more conventional technology meters being used in the field than new-technology meters. New developments, such as more accurate pressure transmitters, new primary elements such as cone elements, reversible flow, and dual rotor turbine meters, and variable area meters with transmitters and a signal output, are discussed.</P><P><STRONG>Features:</STRONG></P><UL><LI>Offers a working knowledge of the origin and development of the more traditional technology flowmeters: differential pressure and primary elements, positive displacement, turbine, open channel, and variable area</LI><LI>Describes how these conventional meters still fit into what is being called I