OPTIWAVE liquid and solid level measurement products from KROHNE include both 24 and 80 GHz versions. They feature improved measurement performance, enhanced software and a more powerful signal processor. Liquid measurement devices include the OPTIWAVE 5400, 7400, 7500 and 3500. Solid level measurement devices include the OPTIWAVE 6400 and 6500. Antennas for each model are designed to meet application-specific installations. A retrofit path for older-style models allows users to keep existing antennas and upgrade electronics without losing the hermetic seal on the tank. 800/356-9464; www.krohne.com