Yokogawa Pressure Transmitter
Product Overview
Industrial Pressure Transmitters are heavy-duty process instruments engineered for continuous, high-reliability measurement of differential, gauge, and absolute pressure across complex process automation systems.
At the core of this lineup is advanced proprietary single-crystal silicon resonant sensor technology. Unlike traditional capacitive sensors, this sensor directly outputs a digital frequency signal without intermediate analog-to-digital conversion, drastically minimizing thermal error and mechanical hysteresis.
Built to withstand harsh industrial environments--ranging from high-static-pressure natural gas pipelines to aggressive chemical reactors--these series provide dependable process data for control loops, safety instrumented systems, and custody transfer applications. Proper transmitter configuration depends strictly on the measurement type, operating pressure range, process temperature, static line pressure, process medium, wetted-part material, communication protocol, installation conditions, and required regional certifications.
Measurement Principle & Configuration
Resonant Silicon Sensor
This technology utilizes a micro-machined single-crystal silicon resonant structure. Two H-shaped resonators are fabricated directly on the silicon chip. As process pressure is applied via isolating diaphragms and fill fluid, the resonant frequency of the active silicon beam shifts proportionally. An internal custom application-specific integrated circuit (ASIC) measures the frequency difference between the two resonators, translating physical pressure directly into a high-resolution digital signal. For applicable differential-pressure models, the sensor system simultaneously captures static pressure and sensor temperature data, which are used in real-time to cancel out common-mode line pressure and temperature-induced errors.
Typical Hardware Configuration
Depending on the selected model and factory options, a complete pressure transmitter assembly includes:
Sensor Module: Digital single-crystal silicon sensor with built-in compensation.
Electronics Housing: Dual-compartment, low-copper die-cast aluminum or stainless steel housing separating terminal wiring from electronic circuits.
Isolation System: Process isolating diaphragms and internal fill fluid.
Communication & Output: 4 to 20 mA DC with HART protocol, FOUNDATION Fieldbus, or PROFIBUS PA.
Local Interface: Optional integrated digital LCD indicator.
Mechanical & Safety Add-ons: Process flanges, mounting brackets, remote seal capillaries, and hazardous-area certification nameplates.
Key Features
High Long-Term Stability: The single-crystal silicon structure ensures exceptional stability, significantly reducing recalibration drift in continuous-running plants.
Active Temperature & Static Pressure Compensation: Real-time correction algorithms eliminate measurement errors caused by rapid process temperature swings and high line pressure.
Robust Overpressure Protection: Engineered with internal dual-diaphragm structures to safely withstand high static overloads up to the maximum working pressure rating without permanent zero-point shift.
Functional Safety Support: Designed to meet rigorous safety-related application standards and functional safety requirements.
Modular Electronics: Interchangeable amplifier boards minimize spare parts inventory on-site.
Flexible Communication: Multiple output options allow seamless integration into modern Distributed Control Systems and asset management software.
Technical Specifications
|
Technical Parameter |
Specification / Selection Basis |
|
Measurement Type |
Differential Pressure (DP), Gauge Pressure (GP), Absolute Pressure (AP) |
|
Sensor Technology |
Resonant silicon sensing technology |
|
Reference Accuracy |
Model- and configuration-dependent (standard options vs. high-accuracy options) |
|
Long-Term Stability |
Model- and configuration-dependent under normal operating conditions |
|
Working Pressure (Static) |
Model-dependent (standard and high static pressure configurations available) |
|
Process Temperature |
Model-, fill-fluid-, seal-, and installation-dependent (standard up to 120 deg C; higher with remote seals) |
|
Ambient Temperature |
Model- and display-dependent (standard operational ranges apply) |
|
Wetted Parts Materials |
316L Stainless Steel, Hastelloy C-276, Tantalum, Monel process covers |
|
Communication Output |
4 to 20 mA DC with HART, FOUNDATION Fieldbus, or PROFIBUS PA |
|
Enclosure & Protection |
IP66 / IP67, Type 4X (NEMA 4X) |
|
Hazardous-Area Approvals |
Explosion-proof and intrinsically safe regional certification options |
Applications
Oil & Gas Extraction & Refining
Wellhead pressure monitoring, distillation column differential pressure control, and custody transfer metering lines.
Chemical & Petrochemical Processing
Reactor vessel level monitoring under aggressive chemical exposure (utilizing specialized wetted parts) and high-temperature catalytic cracking units.
Power Generation
Boiler drum water level measurement, condenser vacuum monitoring, and turbine steam extraction pressure loops.
Water & Wastewater Treatment
High-accuracy aeration basin level control and high-pressure effluent line monitoring.
Model & Configuration Selection (RFQ Checklist)
To ensure error-free engineering specification and prevent installation mismatches, please prepare the following parameters when requesting a quotation:
Select Measurement Type: Specify Differential Pressure (DP), Gauge Pressure (GP), Absolute Pressure (AP), or derived Level/Flow configurations.
Define Pressure Range: Provide minimum, normal, and maximum operating pressures, required measurement span, and maximum static pressure.
Determine Installation Requirements: Define process connections, mounting brackets, manifold requirements, remote seal capillaries, and local display options.
Define Pressure Range
Provide minimum, normal, and maximum operating pressures, required measurement span, and maximum static pressure.
Confirm Process Conditions
Note process medium name, normal/maximum operating temperatures, and corrosive characteristics.
Select Output & Communication
Specify control system interface protocols.
Specify Certification Needs
Outline required regional hazardous-area approvals and functional safety compliance.
Supply Chain, Quality & Global Support
To safeguard international projects against supply risks, technical and logistics teams enforce strict quality assurance procedures:
Authentic Sourcing & Traceability
All supplied transmitters originate from official authorized channels, complete with original factory serial numbers and traceable material test certificates.
Automated Calibration Rigs
Units undergo rigorous multi-point pressure testing across calibrated automated controllers with traceability to national metrology standards.
Secure International Export Packaging
Shipped in industrial-grade, moisture-barrier packaging with process connection caps secured to prevent thread damage or diaphragm puncture during transit.
Global Logistics Support
Backed by reliable international freight handling, secure air/sea export shipping, and comprehensive documentation packages (including Certificates of Conformance and factory calibration reports).
FAQ
With abundant experience, we are one of the most professional yokogawa pressure transmitter suppliers in China. Please feel free to buy high quality yokogawa pressure transmitter in stock here and get quotation from our factory. Good service and low price are available.
Dpharp Transmitter Eja530e, Eja530a Yokogawa Pressure Transmitter, Yokogawa Dpharp Transmitter