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ℹ️ Additional Information
| Condition |
USED/GOOD WORKING CONDITION |
|---|---|
| Manufacturer |
ROSEMOUNT |
| Product Code |
100.103.02310 |
📦 Guarantee Terms
🗂️ Product Files
🖹 Description
The Rosemount.1151 Differential Pressure Transmitter has been the rock of industry for over 40 years. They are definition of stability and longevity. With many configurations available they can be built to suit your application at a great value.
The pressure transmitter model 1151 L1 by Emerson (Rosemount series) is a high-precision industrial instrument designed for accurate pressure and differential pressure measurement in demanding process environments. It is widely used in industries such as oil & gas, chemical processing, and power generation.
What It Is
The Rosemount 1151 L1 is a differential and gauge pressure transmitter that measures pressure (or pressure difference between two points) and converts it into a standardized 4–20 mA signal. This signal is transmitted to a PLC or DCS for monitoring, control, and automation.
What It Does
This device provides continuous, real-time measurement of:
- Gauge pressure
- Differential pressure (ΔP)
It enables advanced process control by supplying accurate data for:
- Flow measurement
- Tank level calculation
- Filter condition monitoring
Design and Components
The transmitter features a rugged industrial design:
- Blue housing: Contains electronics and wiring terminals
- Bottom manifold (4-bolt block):
- Connects high and low pressure sides
- Enables differential pressure measurement
- Flanged base: Allows secure mounting on process lines
This configuration makes it suitable for harsh industrial environments.
How It Works
The operation is based on precise sensing technology:
- Pressure is applied to one or both sides of the sensor
- The internal sensing element detects either absolute or differential pressure
- The signal is converted into a 4–20 mA output
- The output is transmitted to a control system
Example (Differential Pressure Output)
| ΔP | Output |
| 0 bar | 4 mA |
| Mid-range | 12 mA |
| Max ΔP | 20 mA |
Typical Applications
The Rosemount 1151 L1 is commonly used in:
- Flow measurement systems (with orifice plates)
- Tank level measurement
- Filter and strainer monitoring
- Industrial process control loops
Key Advantage
Unlike basic pressure transmitters, this device supports differential pressure measurement, which allows indirect measurement of critical variables such as flow and level.
Comparison with Standard Pressure Transmitters
| Feature | Honeywell STG944 | Rosemount 1151 L1 |
| Type | Gauge pressure | Differential / gauge |
| Use | General measurement | Advanced process measurement |
| Installation | Simple connection | Manifold / flange mounting |
Advantages
- High accuracy and stability
- Suitable for complex measurements (flow, level, ΔP)
- Robust industrial construction
- Compatible with PLC and DCS systems
In Simple Terms
Think of the Rosemount 1151 L1 as a high-precision industrial pressure sensor capable of advanced measurements beyond simple pressure monitoring.
Role in a Control System
Process → Pressure transmitter → PLC/DCS → Controller → Valve/actuator
Big Picture
This device represents the advanced measurement layer in industrial automation systems, enabling precise and reliable process control.
