differential pressure transmitter ST 800 SmartLine, STD624: Differential pressure model (measuring range -250 to +250 inH2O / 625 mbar). Honeywell SmartLine ST800, E1H: Head and diaphragm materials (usually 316L stainless steel with silicone filling fluid)., 00000: Standard options with no special extensions., MB: Approval options (usually for hazardous locations, such as ATEX or IECEx)., S2: Mounting and bracket options (carbon steel "L" bracket)., F1C3: Communication protocol and display (communication Foundation Fieldbus with advanced chart indicator)., 5126: Factory-specific configuration or certification options (such as calibration or compliance certificate).