Square D 9065ST420 NEMA Overload Relay, Electronic Protection, 3 Poles, NEMA Size 4, 45 A 135 A, 600V AC, Trip Class 10 20, Manual Reset 5591A44 Full frequency range or spot Full frequency range or spot OPEN SHORT Media Compatible with Copper Alloy Smallest Graduation 2 psi Gauge Secondary Range Values 0 to 60 Gauge Primary Range Smallest Graduation 10 Characteristics With Brass Internals Gauge Application General Purpose Case Includes Vent Plug Socket Material Brass Connection Type MNPT Standards EN 837 1 Compatible Process Media Liquids and Gases Ambient Operating Temperature Range 4 Degrees to 140 Degrees F ( 20 Degrees to 60 Degrees C) Primary Scale Minor Graduations 10 Pressure Gauge Type General Purpose Dial Pressure Gauge Pressure Range Type Pressure Dial Face Material ABS Dial Color White Accuracy Scale Mid Scale Sensor Type Bourdon Tube Process Connection Gender Male Gauge Case Liquid Glycerin Dry Dampening Feature None Pointer Material ABS Accuracy Grade ASME B40 Adjustable current settings NEMA electronic overload relay triggers contactors to break electrical connections with downstream equipment when current reaches a pre determined range of full load amperage