Dwyer Instruments SFI-100-3/4 Indicator 320819-301 a spring-return model would be
Baker’s notes & crumb story
Description
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