Key Parameters & Specifications Model Series: 1151 (Rosemount Alphaline) Type: Differential Pressure Transmitter Model Designation: 1151DP (Differential Pressure variant) Pressure Range: 300 (Typically 0-30 to 0-300 inH₂O or equivalent range) Diaphragm Material: B (316L Stainless Steel) Fill Fluid: A (Silicone Oil - standard industrial application fill) Process Connection: E (Coplanar flange or specific connection type) Housing Material: C (Epoxy-coated cast aluminum with specific options) Electrical Connection: A (½-14 NPT conduit entry with screw terminals) Output Signal: 4-20 mA DC (two-wire) Housing Code: 142U (Specific housing configuration with options) Key Features Differential Pressure Measurement: Measures pressure difference between two points 316L Stainless Steel Wetted Parts: Good corrosion resistance for general-purpose applications Range 300: Suitable for medium-range differential pressure applications Standard Fill Fluid: Silicone oil for general-purpose temperature ranges Coplanar Design: "E" connection indicates coplanar flange for direct manifold mounting Typical Applications Flow measurement with orifice plates, venturi tubes, and averaging pitot tubes Level measurement in closed tanks Filter monitoring and differential pressure monitoring Pump protection and flow switch applications Heat exchanger monitoring Specifications Details Parameter Value Accuracy Typically ±0.1% to ±0.2% of span Stability ±0.2% of URL for 12 months Temperature Limits -40°F to 250°F (-40°C to 121°C) with silicone fill Static Pressure Limit Up to 2000 psi (138 bar) typical Output 4-20 mA DC Power Supply 12-45 V DC Turn-on Time 2.3 seconds maximum Response Time 0.2 seconds typical Zero Shift ±0.25% of URL per 1000 psi (69 bar) Damping Adjustable electronically Range 300 0-30 to 0-300 inH₂O typical span limits