New Microwave Flow Sensor based on a Left-Handed Transmission Line Resonator

This paper presents a new material density sensor for process monitoring applications based on a composite right/left-handed transmission line resonator. Compared to a conventional right-handed line resonator an increased sensitivity could be demonstrated by measurements of a prototype. The presented sensor principle promises the possibility to design precise permittivity sensors with low to moderate costs. The areas of application of such sensors are gas/solids, gas/liquid and liquid/solids flows in various industrial applications.