The Flexim FLUXUS F721XLF is a non-intrusive metering system for the reproducible and long-term reliable measurement of extremely low flow liquid rates down to 1 gal/h and below on line sizes ranging from 0.4 inch to 2 inches independent of the pipe wall thickness and pressure ranges. Available both in aluminum and stainless-steel housing with ATEX/IECEx zone 2, FM Class I Div. 2 certifications, this low flow ultrasonic flow meter offers advanced data processing capabilities, sophisticated signal filters, bidirectional communication protocols and in-house system factory calibration to achieve highly accurate and repeatable measurements of extremely low flows.