Air Flow Switch Ambient Temperature - Maximum 300 Degrees F Ambient Temperature - Minimum -20 Degrees F Connection Size 1/2 in Connection Type FNPT Contact Rating (DC) 20 V Filter Rating - Maximum 50 micron Flow Rate - Maximum 20 gpm Flow Rate - Minimum 0.5 gpm Flow Switch Type Piston Hazardous Location Specification Class I Div 2 Group A B C D Housing Material Brass Media Temperature - Maximum 300 Degrees F Media Temperature - Minimum -20 Degrees F Overall Height 2 in