No air consumption100% solid-state piezoresistive silicon pressure sensorHigh air flow capacityUniversal 24 VAC/VDC supply voltageField selectable 4 to 20 mA, 0 to 5 VDC or 0 to 10 VDC inputShort circuit and reverse polarity protected inputs and outputsAuto/manual switch with separate increase/decrease pushbuttons (EP-313 only)Precision pressure gauge for branch line indicationNon-interactive zero and span trimmersSmallest size available in the industryConforms to EMC standards EN50082-1/EN55014/EN60730-1