Liquid Flow Switch, Ambient Temperature - Maximum 300 Degrees F, Ambient Temperature - Minimum -30 Degrees F, Connection Size 1 in, Connection Type NPT, Contact Rating (DC) 20 V, Flow Rate - Maximum 52 gpm, Flow Rate - Minimum 15 gpm, Flow Switch Type Paddle, For Pipe Size 1 1/2 in, Hazardous Location Specification Class I, Div 2, Group A, B, C, D, Housing Material 316 Stainless Steel, Media Temperature - Maximum 300 Degrees F, Media Temperature - Minimum -30 Degrees F, Overall Height 8.9 in