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Functions of Pressure Transmitters and Application Analysis of Wireless Pressure Transmitters
With the continuous advancement of industrial automation and intelligent manufacturing, pressure, as one of the core parameters in fluid systems and process control, is directly related to equipment safety, product quality, and production efficiency. Whether in water and gas supply systems, hydraulic and pneumatic equipment, or energy, chemical, and manufacturing production lines, accurate pressure measurement, stable transmission, and timely response are fundamental to ensuring safe and reliable system operation.
Pressure transmitters are widely applied as key devices to meet these needs. With the development of communication technologies, wireless pressure transmitters have gradually become an important option for complex operating conditions and remote monitoring scenarios.
What Is a Pressure Transmitter
A pressure transmitter is an industrial measurement device that converts the pressure signal of a measured medium into a standard electrical signal. It typically uses strain-gauge, diffused silicon, or ceramic pressure sensing elements as its core. Through signal conditioning, circuit amplification, and compensation processing, pressure values are output in standard signal formats, such as:
Analog signals (4–20 mA, 0–10 V)
Digital signals (RS485 / Modbus RTU)
Wireless communication signals (4G / NB-IoT, etc.)
These signals can be collected in real time by PLCs, DCS systems, host computers, industrial gateways, or cloud platforms for monitoring, control, and data analysis.
Working Principle of Pressure Transmitters
The core of a pressure transmitter lies in its pressure sensing chip. When the medium pressure acts on the sensing diaphragm, the internal resistance, capacitance, or voltage characteristics of the chip change accordingly.
The basic process is as follows:
Pressure acts on the sensing diaphragm
The sensing chip converts mechanical deformation into a weak electrical signal
The internal circuit amplifies, filters, and linearizes the signal
Temperature compensation algorithms correct environmental temperature effects
A stable, standardized electrical or wireless signal is output
This process ensures the accuracy and consistency of pressure data in complex industrial environments.
Structural Analysis of Nexisense Pressure Transmitters
High-Performance Pressure Sensing Unit
Nexisense pressure transmitters adopt high-sensitivity pressure sensing chips capable of detecting minute pressure changes, offering excellent repeatability and long-term stability, making them suitable for continuous operation conditions.
Signal Processing and Temperature Compensation Circuit
Advanced circuit design and temperature compensation technology enable automatic temperature compensation and temperature drift correction, significantly reducing the impact of ambient temperature changes on measurement accuracy.
Communication and Interface Modules
Support for commonly used industrial RS485 communication and compatibility with the Modbus RTU protocol allow easy integration into existing automation systems or monitoring platforms.
Local Display and Interaction
Some models are equipped with built-in displays, enabling on-site visualization of real-time pressure values for inspections and quick assessment of equipment operating status.
Features and Advantages of Wireless Pressure Transmitters
Building upon traditional wired pressure transmitters, wireless pressure transmitters further enhance deployment flexibility and operational efficiency.
Wireless Data Transmission Capability
Wireless pressure transmitters transmit pressure data directly to cloud platforms or local servers via 4G and other communication methods, enabling remote real-time monitoring, especially suitable for dispersed points and locations where wiring is inconvenient.
Local Display and Instant Feedback
With built-in displays, on-site personnel can view pressure status without additional terminals, improving response efficiency.
Enhanced Environmental Adaptability
Designed to withstand common industrial challenges such as vibration, shock, and electromagnetic interference, wireless pressure transmitters feature reinforced structures and optimized circuit designs, offering strong anti-vibration, anti-shock, and RF interference resistance.
Data Storage and Breakpoint Protection
In the event of communication interruptions or network failures, devices can store pressure data locally and upload it once communication is restored, effectively preventing data loss.
Main Functions of Pressure Transmitters
Real-time monitoring of pressure changes to understand equipment operating conditions
Ensuring system safety by preventing failures caused by overpressure or underpressure
Supporting process control by providing reliable data for automatic regulation
Enabling remote operation and maintenance, reducing manual inspection costs
Providing foundational data for analysis to support equipment optimization and management
Typical Application Scenarios
Industrial Pipelines and Fluid Systems
Used to monitor pressure in water, gas, oil, and other pipelines, enabling timely detection of abnormal fluctuations.
Hydraulic and Pneumatic Equipment
Ensure stable operation within designed pressure ranges, preventing damage to seals and actuators.
Energy and Municipal Facilities
Enable remote pressure monitoring and centralized management in water supply, gas supply, and heating systems.
Unattended and Distributed Scenarios
Wireless pressure transmitters demonstrate clear advantages in pump stations, outdoor equipment, and dispersed sites.
Measurement Methods and System Integration
Nexisense pressure transmitters can be flexibly integrated into various system architectures:
RS485 bus connection to PLCs and industrial gateways
Data upload to SCADA or environmental monitoring systems
Wireless models directly connected to cloud platforms for web and mobile access
Systems can support real-time display, historical data logging, trend analysis, and alarm notifications.
Installation, Maintenance, and Routine Care
Installation Considerations
Avoid installation in areas with strong vibration or severe impact
Select appropriate measurement ranges to prevent long-term overload
Ensure reliable sealing of pressure interfaces to prevent leakage
Maintenance and Care Recommendations
Regularly check zero point and range stability
Keep sensing interfaces clean to prevent media blockage
Perform periodic calibration for long-term use
Reference Technical Parameters (Indicative)
Pressure range: −0.1 MPa to 60 MPa (optional)
Accuracy: ±0.5% FS / ±0.25% FS
Output modes: 4–20 mA / RS485 / 4G
Communication protocol: Modbus RTU
Power supply: DC 12–24 V / built-in battery
Operating temperature: −20 ℃ to +70 ℃
(Specific parameters are subject to actual Nexisense models.)
Frequently Asked Questions (FAQ)
Can wireless pressure transmitters completely replace wired products?
Not entirely. Wired and wireless solutions each have suitable application scenarios and should be selected based on actual site conditions.
Do pressure transmitters require regular calibration?
In high-precision or critical processes, periodic calibration is recommended to ensure data reliability.
Conclusion
Pressure transmitters are indispensable fundamental measurement devices in industrial automation systems, while wireless pressure transmitters further expand the application boundaries of pressure monitoring. With Nexisense pressure transmitters and wireless pressure transmitters, enterprises can achieve accurate pressure data acquisition, stable transmission, and remote management, providing reliable support for equipment safety and production optimization.
As industrial intelligence continues to advance, a scientific and stable pressure monitoring system is becoming an essential foundation for ensuring long-term reliable system operation.
