Description
YOKOGAWA PW481-50 Product Overview
The YOKOGAWA PW481-50 is a high-precision pressure transmitter designed for industrial process measurement and control applications. This advanced instrument combines Yokogawa’s renowned measurement technology with robust construction for reliable operation in demanding environments.
Key Features
High Accuracy: ±0.075% of span
Wide Measurement Range: From 0.1 kPa to 40 MPa
Multivariable Capability: Simultaneous pressure and temperature measurement
Advanced Diagnostics: Predictive maintenance features
Flexible Communication: HART 7, FOUNDATION Fieldbus, or PROFIBUS PA
Technical Specifications
| Parameter | Specification |
| Model | PW481-50 |
| Manufacturer | YOKOGAWA |
| Type | Pressure Transmitter |
| Measuring Principle | Single-crystal silicon resonant sensor |
| Pressure Ranges | 0.1 kPa to 40 MPa (multiple range options) |
| Accuracy | ±0.075% of span |
| Long-term Stability | ±0.1% of URL per 10 years |
| Output Signals | 4-20mA HART, Fieldbus, PROFIBUS PA |
| Process Connection | 1/2″ NPT, G1/2, or flange options |
| Materials | 316L SST standard, Hastelloy® options |
| Environmental Rating | IP66/IP68, NEMA 4X |
| Operating Temperature | -40°C to +85°C |
| Power Supply | 10.5-42V DC (loop powered) |
YOKOGAWA PW481-50
Main Features & Benefits
1. Superior Measurement Performance
Single-crystal silicon resonant sensor for exceptional stability
Integrated temperature compensation for accuracy across operating range
100:1 turndown ratio for wide application flexibility
2. Advanced Functionality
Built-in diagnostics for predictive maintenance
Multivariable output (pressure and temperature)
Digital communication for enhanced data access
3. Robust Industrial Design
Dual-compartment housing for electronics protection
Chemical-resistant materials for harsh processes
Global certifications for hazardous areas
YOKOGAWA PW481-50
Application Fields
Process Industries
Oil & Gas: Wellhead monitoring, pipeline pressure
Chemical/Petrochemical: Reactor pressure control
Power Generation: Steam system monitoring
Specialty Applications
Pharmaceutical: CIP/SIP systems
Water/Wastewater: Pump protection
Food & Beverage: Hygienic processes
Related Products
| Model | Description |
| PW482-50 | Higher pressure version (up to 100MPa) |
| PW481-51 | Flanged connection variant |
| YTA320 | Temperature transmitter |
| ADMAG TI | Magnetic flow meter |
| AXR10D | Signal conditioner |
Installation & Maintenance
Installation Guidelines
Mounting position affects zero point (consult manual)
Impulse piping should minimize trapped gas/liquid
Proper grounding for lightning protection
Use shielded cables for noise immunity
Maintenance Recommendations
Annual verification of zero and span
Regular diagnostic checks via asset management software
Seal inspection every 2 years
Firmware updates as recommended
