Flow Switch, Ambient Temperature - Maximum 140 Degrees F, Ambient Temperature - Minimum -14 Degrees F, Connection Size 3/4 in, Connection Type FNPT, Contact Rating (AC) 45 mA @ 30V, Contact Rating (DC) 65 mA @ 42V, Flow Rate - Maximum 2.79 gpm, Flow Rate - Minimum 1 gpm, Flow Switch Type Thermal-Dispersion, Housing Material 316 Stainless Steel, Media Temperature - Maximum 140 Degrees F, Media Temperature - Minimum -14 Degrees F, Overall Length 4 in, Overall Width 1.5 in