Liquid Flow Switch, Ambient Temperature - Maximum 163 Degrees F, Ambient Temperature - Minimum -4 Degrees F, Connection Size 1 1/2 in, Connection Type NPT, Contact Rating (AC) 10 A @ 125/250V, Contact Rating (DC) 1 A res., .5 A ind. @ 30 VDC. MT option: 5 A @ 125/250 VAC. [MT and MV option not UL, CSA, FM or ATEX or IECEx]., 5 A res., 3 A ind. @ 30 VDC . MV option: 1 A @125 VAC, UL, FM, ATEX and IECEx models 10 A @ 125/250 VAC. CSA models: 5 A @ 125/250 VAC