Detailed Product Description FSF50P-3A FENSHEN Flow Switch is used in measuring ... where it needs chain effect or cutout protection. FSF50P-3A FENSHEN Flow Switch has SPDT switch, full-sealing structure ... which can assure its use in any conditions. FSF50P-3A FENSHEN Flow Switch is used for caustic fluid liquid, ... 234568Min.flowFlow increaseR to B closes1.01.31.73.14.16.28.412.916.846.6Flow decreaseR to Y ...