Overview
The Rosemount 1151LT5EA0A22D is a flange-mounted liquid level and pressure transmitter engineered for continuous process measurement in industrial automation systems. With over 8 million installations, the Rosemount 1151 is one of the most popular transmitters in use today. This model combines proven electromechanical design with flexible output electronics, making it suitable for retrofit and replacement applications where long-term uptime is critical.
Key Features
- 0–750 inWC Measurement Range: Full-scale span for liquid level and pressure applications up to 750 inches of water column.
- 4–20 mA Analog Output: Industry-standard current loop compatible with distributed control systems (DCS), programmable logic controllers (PLCs), and analog input modules.
- 285 PSI Rated Pressure: Withstands static line pressures up to 285 psi in standard configurations.
- Flange-Mount Design: Direct vessel connection via NPT or ANSI flange; compact footprint minimizes installation footprint.
- Proven Reliability: The Rosemount 1151 pressure transmitter is known to offer long-term and reliable performance. This transmitter offers various configurations for gage, differential, and absolute pressure measurements.
- Multiple Wetted Materials: Various alternative fill fluids and wetted materials used help ensure compatibility. Low-power, analog, and smart electronics are available to meet diverse application requirements.
Technical Specifications
- Model: 1151LT5EA0A22D
- Manufacturer: Rosemount (Emerson)
- Measurement Type: Liquid Level / Differential Pressure
- Pressure Range (URL): 0–750 inWC (0–1865 Pa)
- Static Pressure Rating: 285 PSI (1,965 kPa)
- Output Signal: 4–20 mA DC (linear or square-root selectable)
- Connection: Flange-mounted with 1/4–18 NPT low-pressure port
- Operating Temperature Range: –40 to 85°C (–40 to 185°F) for standard electronics
- Repeatability: ±0.5% of calibrated span
- Weight: Approximately 12 lbs (5.4 kg) without meter; 15 lbs (6.8 kg) with meter
- Wetted Materials: 316 stainless steel diaphragm, silicone oil fill
- Certifications: HART protocol compatible (4–20 mA with digital communication)
Typical Applications
- Tank level monitoring in chemical processing plants
- Water and wastewater treatment level control
- Boiler feed water pressure monitoring
- Hydraulic system pressure measurement
- Flow measurement via differential pressure across an orifice plate or venturi
- Oil and gas production pressure transmissions
- HVAC chilled-water system pressure control
Compatibility & Replacements
Compatible With
- Allen-Bradley CompactLogix, ControlLogix, SLC 500 analog input modules (4–20 mA)
- Siemens S7-1200, S7-1500 with analog input cards
- Mitsubishi Q-series PLC analog input modules
- Omron CJ-series PLC with analog terminals
- Schneider Electric M241, Modicon Quantum analog inputs
- General industrial DCS systems (Honeywell, Invensys, ABB)
- Data acquisition systems and test equipment with 4–20 mA input
- HART-compatible multiplexers and control valves
Replaces / Drop-In Replacement For
- Rosemount 1151 series (various suffix configurations)
- Consult your system integrator or process documentation to confirm exact pressure range and output compatibility before ordering.
Works With
- 4–20 mA analog input loops
- HART Protocol (Highway Addressable Remote Transducer)
- Legacy process control systems and modern DCS platforms
- Current-to-pressure transducers for pneumatic control loops
- Standard industrial transmitter interconnect specifications
