Ultrasonic flow meters are not a specific brand but a category of devices used to measure fluid flow rates using ultrasonic technology. These meters are produced by various companies worldwide, such as Siemens (Germany), Endress+Hauser (Switzerland), and Krohne (Germany). They serve industries like water treatment, oil and gas, chemical processing, and HVAC. Key products include clamp-on, portable, and inline ultrasonic flow meters, which offer non-invasive, accurate, and maintenance-free flow measurement solutions.