Key Parameters & Specifications Model Series: 1151 (Rosemount Alphaline) Type: Differential Pressure Transmitter Model Designation: 1151DP (Differential Pressure variant) Pressure Range: 301 (Typically 0-30 to 0-300 inH₂O or equivalent range) Diaphragm Material: C (Hastelloy® C-276 - corrosion-resistant alloy) Fill Fluid: A (Silicone Oil - standard industrial application fill) Process Connection: A (¼-18 NPT on standard centers for manifold mounting) Housing Material: A (Epoxy-coated cast aluminum, standard) Electrical Connection: A (½-14 NPT conduit entry with screw terminals) Output Signal: 4-20 mA DC (two-wire) Housing Code: 115U (Specific housing configuration with options) Key Features Differential Pressure Measurement: Measures pressure difference between two points Hastelloy C-276 Wetted Parts: Excellent corrosion resistance for harsh chemicals and aggressive process fluids Range 301: Suitable for medium-range differential pressure applications Standard Fill Fluid: Silicone oil for general-purpose temperature ranges Standard Process Connection: Compatible with common manifold systems 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 301 0-30 to 0-300 inH₂O typical span limits