F-4200 Series Clamp-on Ultrasonic Flow Meter ONICON Clamp-on Transit Time Ultrasonic Flow Meters are ideal for those applications where it is difficult to install insertion or inline flow meters. It is not necessary to shut down flow or penetrate the pipe in any way when installing this meter. Instead, a pair of precision signal transducers that are matched to the pipe accurately measure flow through the pipe wall. Click here for more information.   F-5200 Thermal Mass Flow Meter The ONICON F-5200 Thermal Mass Fflow Meter is accurate and easy-to-use. It is ideal for retrofit installation of natural gas and compressed air lines. Suitable for ¼” – 24” diameter pipes Click here for more information.