The JW-PM02X(JY03) Fully Welded Pressure Transmitter is designed for accurate and stable pressure measurement in industrial processes, hydraulic systems, petrochemical applications, constant-pressure water supply, and industrial automation.
Featuring a fully welded internal sealing structure without an internal O-ring, the transmitter combines a precision pressure-sensing element with signal amplification, linear compensation, anti-interference processing, and protective circuitry.
Multiple pressure ranges, accuracy classes, output signals, supply voltages, and mechanical configurations are available to accommodate different industrial measurement requirements.
1. Product Overview
1.1 What Is a Fully Welded Pressure Transmitter?
A fully welded pressure transmitter converts process pressure into an electrical signal while incorporating welded joints within its pressure-sensing assembly.
The JW-PM02X(JY03) uses an internal welded sealing construction without an internal O-ring.
This design reduces dependence on elastomeric sealing elements within the welded assembly, making it a suitable option for industrial applications where mechanical sealing construction is an important consideration.
A fully welded internal structure does not eliminate the need for proper external process connection sealing.
1.2 Pressure Measurement and Signal Processing
The JW-PM02X(JY03) integrates a precision pressure-sensing element with dedicated signal-conditioning electronics.
The measurement process includes:
Pressure detection through the sensing element.
Electrical signal amplification.
Linear compensation.
Anti-interference and protective signal processing.
Conversion to the selected analog or digital output.
The resulting signal can be received by compatible PLCs, RTUs, industrial controllers, and data acquisition devices.
The available signal configurations allow the transmitter to be integrated into different industrial automation and monitoring systems.
2. Technical Specifications
Parameter
Specification
Model
JW-PM02X(JY03)
Product Type
Fully Welded Pressure Transmitter
Pressure Range
Selectable kPa and MPa ranges, up to 1000 kPa and 10 MPa within the listed series
Pressure Type
Gauge (G), Sealed Gauge (S), Absolute (A)
Accuracy Class
0.1 / 0.2 (0.25) / 0.5
Output Signal
4–20mA, 0–5VDC, 0.5–4.5VDC, 0–10VDC, IIC, RS485
Supply Voltage
8–30VDC / 5–8VDC / 3.3VDC
Compensation Temperature
0 to 50°C or -10 to 70°C
Operating Temperature
-20 to +85°C
Storage Temperature
-40 to +125°C
Long-Term Stability
≤0.2%FS/year or ≤0.5%FS/year
Response Time
<1 ms
Overload Capacity
200%
Diaphragm Materials
316L / C276 / TC4
Housing Materials
304SS / 316L / C276 / TC4
Electrical Connection
DIN43650A or other selectable connections
Process Connection
M20×1.5 or other selectable connections
Protection Grade
IP65 / IP66 / IP67 / IP68
Explosion Protection
Ex ia IIC T6 option, subject to configuration and certification confirmation
Measurement Media
Media compatible with the selected wetted materials
Available specifications depend on the selected configuration. Confirm the exact pressure range, accuracy, output, supply voltage, process connection, and environmental requirements before ordering.
2.1 Accuracy and Measurement Performance
Different accuracy classes are available to match industrial measurement requirements.
Performance Parameter
Class 0.1
Class 0.2 (0.25)
Class 0.5
Nonlinearity
0.1
0.2 (0.25)
0.5
Repeatability
0.1
0.2 (0.25)
0.5
Hysteresis
0.1
0.2 (0.25)
0.5
Zero Drift
0.01
0.02 (0.025)
0.05
Sensitivity Drift
0.01
0.02 (0.025)
0.05
The numerical values are configuration-dependent performance indicators. Refer to the confirmed specification sheet for measurement units, reference conditions, and applicable tolerances.
The JW-PM02X(JY03) supports three pressure measurement configurations.
Gauge Pressure (G)
Measures pressure relative to atmospheric pressure. Commonly used in water supply, pumps, and industrial pipeline pressure monitoring.
Sealed Gauge Pressure (S)
Measures pressure relative to a sealed reference pressure and can be selected for suitable industrial pressure measurement applications.
Absolute Pressure (A)
Measures pressure relative to a vacuum reference and is used where absolute pressure values are required.
The correct pressure type should be determined by the application’s reference pressure requirements.
3. Fully Welded Structure and Sealing Design
The fully welded sealing structure is a key distinguishing feature of the JW-PM02X(JY03).
3.1 Internal Structure Without an O-Ring
The transmitter features a welded internal sealing design without an internal O-ring.
Compared with assemblies that depend on internal elastomeric seals, this construction reduces reliance on internal sealing rings within the welded sensing assembly.
Relevant selection considerations include:
Sealing construction
Process pressure and pressure fluctuations
Wetted material compatibility
Operating temperature
Long-term application conditions
Installation requirements
The suitability of a welded pressure transmitter depends on the complete product configuration and operating environment.
3.2 Internal Sealing vs External Process Sealing
It is important to distinguish the internal welded assembly from the external process connection.
Although the internal welded sensing assembly does not use an O-ring, an external gasket or sealing ring may still be required at the process connection.
Correct mechanical installation and process sealing remain essential for reliable pressure measurement.
3.3 Fully Welded vs Conventional Pressure Transmitter
Feature
Fully Welded Internal Design
Conventional Sealed Design
Internal sealing
Welded construction
May use elastomeric sealing
Internal O-ring
Not used in the specified assembly
May be used
Fluid compatibility
Depends on wetted materials
Depends on wetted materials and sealing components
Measurement accuracy
Depends on sensor and calibration
Depends on sensor and calibration
External connection sealing
May be required
May be required
Maintenance requirements
Application-dependent
Application-dependent
The primary distinction is the internal mechanical sealing arrangement rather than the pressure measurement principle.
4. Output Signals and Power Supply Options
The JW-PM02X(JY03) provides multiple analog and digital output configurations for integration with industrial controllers and data acquisition systems.
4.1 Analog Output Options
4–20mA Current Output
Suitable for compatible industrial analog input modules, PLCs, and process monitoring equipment.
Voltage Outputs
Selectable voltage outputs include:
0–5VDC
0.5–4.5VDC
0–10VDC
The selected voltage output must match the receiving controller’s input range and the applicable supply requirements.
4.2 Digital Output Options
RS485
Provides a digital electrical interface for compatible industrial data acquisition and control equipment.
The communication protocol and register information depend on the selected device configuration.
IIC
An IIC interface option is also available for compatible electronics and embedded integration applications.
4.3 Output Signal Selection Codes
Code
Output Signal
S1
4–20mA
S2
0.5–4.5VDC
S3
0–5VDC
S4
0–10VDC
S5
IIC
S6
RS485
ST
Customized output
4.4 Power Supply Selection Codes
Code
Supply Voltage
U1
8–30VDC
U2
5–8VDC
U3
3.3VDC
Output signals and supply voltage options must be selected as compatible combinations.
5. Industrial Applications
5.1 Petrochemical Process Monitoring
Petrochemical facilities use pressure transmitters to monitor pressure conditions in compatible pipes, process equipment, and production systems.
The JW-PM02X(JY03) provides configurable pressure measurement options where welded sealing construction and material selection are important project considerations.
Chemical compatibility, operating conditions, and applicable safety requirements must be evaluated before installation.
5.2 Constant-Pressure Water Supply
Pressure transmitters provide measurement feedback for water supply and pump-control applications.
Typical monitoring points include:
Water supply pipelines
Booster pump discharge lines
Constant-pressure pump systems
Industrial water distribution networks
When connected to a compatible controller, pressure measurements can support automatic pump regulation and system monitoring.
5.3 Hydraulic Pressure Monitoring
Hydraulic systems require pressure measurement for control and equipment diagnostics.
Potential applications include:
Hydraulic power units
Hydraulic manifolds
Pump discharge monitoring
Industrial machinery
The pressure range and overload requirements must be selected according to normal operating pressure and potential transient pressure peaks.
5.4 Pneumatic and Compressed Air Systems
The JW-PM02X(JY03) can be considered for compatible pneumatic and compressed air pressure measurement applications.
Pressure feedback can support equipment monitoring, process control, and industrial automation.
5.5 Industrial Measurement and Control
With selectable analog and digital outputs, the transmitter can be integrated into various industrial monitoring configurations.
Selecting the correct materials is essential for pressure measurement in different industrial media.
6.1 Diaphragm Materials
Available diaphragm material options include:
316L stainless steel
C276 alloy
TC4 titanium alloy
Material selection should consider chemical compatibility, operating temperature, and process conditions.
6.2 Housing Materials
Available housing material options include:
304 stainless steel
316L stainless steel
C276 alloy
TC4 titanium alloy
Additional material selections may be available for customized configurations.
The housing material and diaphragm material should be evaluated separately when selecting a transmitter for a particular application.
6.3 Measurement Media Compatibility
The transmitter can be configured for industrial fluids compatible with its selected wetted materials.
For corrosive media, confirm the full wetted-material configuration and operating conditions before selection.
7. Electrical and Process Connection Options
7.1 Electrical Connection Options
Different electrical interface configurations are available.
Code
Connection Type
1
Hirschmann-style connector
2
PG7 cable gland
3
M12 connector
4
Direct cable outlet
5
Additional connector variant
6
Mini Hirschmann-style connector
0T
Customized connection
The electrical connection must match the required wiring arrangement and protection level.
7.2 Process Connection Options
Code
Process Connection
C1
M20×1.5
C2
G1/2
C3
G1/4
C4
1/2NPT
Cn
Customized process connection
Confirm the thread standard, process pressure, and sealing method before installation.
8. PM02X Pressure Transmitter Selection Guide
The JW-PM02X(JY03) offers multiple configurable options for different industrial pressure measurement requirements.
8.1 Example Ordering Configuration
PM02-01-S1-U1-30-C1-X001PU-[0–1] MPa
Code
Description
PM02
Fully welded pressure transmitter series
1
Hirschmann-style electrical connection
S1
4–20mA output
U1
8–30VDC supply
30
304SS housing material
C1
M20×1.5 process connection
X001PU
Cable specification code
[0–1] MPa
Pressure measurement range
The example illustrates the configuration format. The final model code should be confirmed according to the selected product options.
8.2 How to Select the Correct Configuration
Step 1: Define the measured medium
Specify water, oil, air, compatible gases, or another process medium.
Step 2: Determine the pressure range
Consider normal pressure, maximum pressure, and possible transient pressure peaks.
Step 3: Select the pressure type
Choose gauge, sealed gauge, or absolute pressure.
Step 4: Define the accuracy requirement
Select the appropriate accuracy class based on measurement and control requirements.
Step 5: Choose the output signal and power supply
Specify compatible analog or digital signal and voltage configurations.
Step 6: Select materials and connections
Choose diaphragm material, housing material, electrical connection, and process fitting.
Step 7: Review environmental conditions
Confirm operating temperature, ingress protection, and special application requirements.
9. PLC, RTU and Industrial Monitoring Integration
The JW-PM02X(JY03) can be integrated into industrial pressure monitoring systems through compatible input modules and controllers.
9.1 PLC-Based Pressure Monitoring
A typical analog pressure monitoring architecture is:
Pressure Transmitter → Analog Input Module → PLC → Industrial Control System
The transmitter provides the pressure signal, while the PLC or controller performs measurement processing and control functions.
9.2 Remote Pressure Monitoring
The transmitter can be connected to compatible RTUs or data acquisition systems for remote monitoring.
A typical system architecture is:
Pressure Transmitter → RTU / Data Logger → Communication Gateway → SCADA / Cloud Platform
Remote communication and cloud connectivity are provided by external system components.
9.3 RS485 Integration
For RS485 configurations, confirm:
Communication protocol
Device address
Serial communication settings
Register map
Wiring arrangement
Supply voltage compatibility
The RS485 electrical interface does not by itself specify the communication protocol.
10. Installation and Maintenance Guidelines
10.1 Process Connection Installation
Install the transmitter using the correct threaded process fitting.
Apply tightening force at the designated hexagonal wrench section.
Avoid applying mechanical torque through the sensor housing or electrical connector.
10.2 External Process Sealing
Use the appropriate external sealing method for the selected process connection.
The absence of an internal O-ring does not eliminate external connection sealing requirements.
10.3 Electrical Wiring
Verify the power supply, output signal, wiring diagram, and receiving equipment before operation.
Ensure electrical connectors and cable assemblies are correctly installed.
10.4 Pressure Overload Protection
The transmitter has a listed overload capacity of 200%.
Continuous operation should remain within the selected rated measurement range.
Pressure pulsation and hydraulic transients may require additional protection.
10.5 Environmental Protection
Select the appropriate IP protection configuration according to the installation environment.
The final ingress protection rating depends on the selected device and connector arrangement.
10.6 Inspection and Calibration
Inspect process connections, electrical wiring, and sealing conditions as part of routine maintenance.
Calibration requirements depend on the measurement accuracy, operating conditions, and application-specific maintenance schedule.
11. Why Choose JW-PM02X(JY03)?
The JW-PM02X(JY03) combines a fully welded internal sealing structure with flexible industrial pressure measurement configurations.
Its main advantages include:
Fully welded internal construction without an internal O-ring
Multiple measurement ranges and pressure types
Selectable accuracy classes
Analog and digital output options
Different diaphragm and housing materials
Multiple electrical and process connection configurations
Compatibility with suitable industrial automation and monitoring equipment
These features make it a configurable option for industrial equipment manufacturers, system integrators, and engineering projects.
12. Request a Quotation
Looking for a fully welded pressure transmitter for industrial pressure measurement?
JW-IoT provides configuration and quotation support for industrial pressure sensor applications.
To select the appropriate version, please provide:
Application and measurement medium
Pressure range and pressure type
Accuracy requirement
Output signal and supply voltage
Electrical and process connections
Operating temperature and environmental conditions
Required quantity
Contact JW-IoT to discuss your pressure monitoring requirements.
FAQ
Q
1. What is a fully welded pressure transmitter?
A
A fully welded pressure transmitter uses welded joints within the pressure-sensing assembly. The JW-PM02X(JY03) features a fully welded internal sealing structure without an internal O-ring.
Q
2.Does the JW-PM02X(JY03) use an O-ring?
A
The internal welded sensing assembly does not use an O-ring. External process connections may still require appropriate sealing components.
Q
3. What output signals are available?
A
Available options include 4–20mA, 0–5VDC, 0.5–4.5VDC, 0–10VDC, IIC, and RS485.
Q
4. What accuracy options are available?
A
Selectable accuracy classes include 0.1, 0.2 (0.25), and 0.5. Exact performance conditions depend on the selected configuration.
Q
5. Can this pressure transmitter measure absolute pressure?
A
Yes. Gauge, sealed gauge, and absolute pressure configurations are available.
Q
6. Is the welded pressure transmitter suitable for corrosive media?
A
It can be configured with different material options, including 316L, C276, and TC4. Suitability depends on the actual process-fluid compatibility.
Q
7. Can it connect to PLC and RTU systems?
A
Yes. The transmitter offers analog and digital output options for connection to compatible industrial controllers and data acquisition devices.
Q
8. Is an explosion-protected version available?
A
An Ex ia IIC T6 option is listed for the series. The applicable certification and exact configuration must be confirmed for hazardous-area installations.
Q
9. Can the electrical and process connections be customized?
A
Yes. Multiple electrical connector and process fitting options are available, including M20×1.5, G1/2, G1/4, and 1/2NPT connections.
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