Polysulfone sight flow indicator with A-711 sensor, range 3-35 GPM 11.4-132.5 LPM, 3/4in female NPT, Dwyer Instruments, Mfr#: SFI-800-3/4-A711$290.99+
Magnetic flow sensor, range 2.5 to 52.8 GPM 10 to 200 LPM, 3/4 I.D., 1in NPT process connection, Dwyer Instruments, Mfr#: MFS-31$4,125.99+