Flow Switch, Industrial, Max. HP 1/8 to 1/4, 1 Phase, 60 Hz, Min. Flow Rate (GPM) 4.5 gpm, Max. Flow GPM 1,500 gpm, Flow Rate Flow Decrease 3.5 to 7 gpm, Flow Increase 4.5 to 9.5 gpm, Connection Size (In.) 1, Switch Enclosure NEMA 1, Min. Ambient Temp. (F) 32 Degrees , Max. Ambient Temp. (F) 176 Degrees F, Min. Fluid Temp. (F) 32 Degrees F, Max. Fluid Temp. (F) 250 Degrees F, Max. Pressure (PSI) 250 psi, Operating Velocity Range (FPM) 3.5 to 600, Switch Type SPDT