sequence switching

this unit is dedicated to 1-heat/1-cool conventional systems

Key Benefits OEM Precision: Guaranteed compatibility with Lennox equipment

It utilizes robust logic to interpret data from defrost sensors

Dwyer Instruments SFI-100-1/2 Indicator Els PW 29614 sequence switchingThe Dwyer Instruments SFI 100 1 2 is a field proven midwest sight flow indicator designed for immediate visual verification of fluid movement. Integrated with a 1 2" NPT female connection, this unit features a single window design with a high visibility rotating impeller that provides clear confirmation of flow rates in both liquid and gas applications. Constructed with a heavy duty bronze body and a tempered glass window, it is built to withstand the