Dwyer Instruments SFI-100-3/4 Indicator 320819-301 a spring-return model would be

a spring-return model would be required

OEM Compatibility: Precision-engineered as a direct Trane replacement part for 5-ton capacity units

ensuring correct heat transfer across the coils

Can this sensor be used without a mixing tube

Dwyer Instruments SFI-100-3/4 Indicator 320819-301 a spring-return model would beThe Dwyer Instruments SFI 100 3 4 is a field proven sight flow indicator designed for immediate visual verification of fluid movement in pressurized systems. For an HVACR contractor, this 3 4" NPT inline flow indicator is essential for diagnosing flow issues in chiller systems, hydraulic lines, and industrial coolant loops. Built with a heavy duty bronze body and a rugged tempered glass window, it handles line pressures up to 125 psig and operating