Model  | Chamber material and pipe size  | Max. No. of switch mechan.  | Control press. rating  | Minimum liquid Sp.Gr  | Switch contact type  | Switch contact rating  |  Psig  | Bars  |  100˚F  | 750˚F  | 38℃  | 400℃ Max.  |  OMS-F401  | Carbon steel (4")  | 2  | 285  | 95  | 20  | 7  | 0.57  | 120VAC, 15A  | SPDT  |  OMS-F402  | Carbon steel (4")  | 2  | 600  | 450  | 41  | 31  | 0.65  | 120VAC, 15A  | SPDT  |  OMS-F301  | Carbon steel (3")  | 1  | 285  | 95  | 20  | 7  | 0.67  | 120VAC, 15A  | SPDT  |  OMS-F302  | Carbon steel (3")  | 1  | 350  | 260  | 24  | 18  | 0.67  | 120VAC, 15A  | SPDT  |  OMS-S401  | Carbon steel (4")  | 2  | 600  | 450  | 41  | 31  | 0.65  | 120VAC, 15A  | SPDT  |  OMS-S301  | Carbon steel (3")  | 1  | 300  | 225  | 21  | 16  | 0.57  | 120VAC, 15A  | SPDT  |  OMS-S302  | Carbon steel (3")  | 1  | 350  | 260  | 24  | 18  | 0.67  | 120VAC, 15A  | SPDT  |  OMS-SF  | Carbon steel  | 1  | 230  | 95  | 16  | 7  | 0.50  | 120VAC, 15A  | SPDT  |  OMS-TF  | Carbon steel  | 1  | 225  | 165  | 16  | 11  | 0.81  | 120VAC, 15A  | SPDT  |  OMS-S303  | Carbon steel  | 1  | 285  | 95  | 20  | 7  | 0.70  | 120VAC, 15A  | SPDT  |  
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