we are offering DMTFF Wall-mount Flanged Ultrasonic Flow Meters.Features1. Calibrated in manufacture's lab, field setup is unnecessary.2. Measurement is independent of fluid nature with wider applications than magnetic meters.3. Available including up to 8GB event data logger, can search the event of totalizer flow, flow rate, velocity etc.4. Parallel operation of positive, negative and net flow totalizer, while the output of totalizer pulse and frequency output are transmitted via open collector.5. Re-calibration or maintenance is easy, no processing interruption (just plug out the inserted transducers from pipe line, when re-calibration or maintenance is finished), can be hot-tapped.