Monocrystalline Silicon Pressure Transmitter: The Core Technical Path for High-Precision Industrial Pressure Measurement

In petrochemical, energy, power generation, environmental protection, and process industries, pressure parameters are not only fundamental variables for process control but also critical safeguards for safe equipment operation. As operating conditions continue to become more complex, traditional diffused silicon or ceramic pressure sensing technologies are increasingly revealing limitations in terms of accuracy, stability, and overload resistance.

Relying on its material properties and structural advantages, the monocrystalline silicon pressure transmitter has become an important development direction in the field of high-precision and high-stability pressure measurement. Based on mature monocrystalline silicon pressure sensing technology, Nexisense has established a pressure measurement solution suitable for micro differential pressure, high static pressure, and harsh industrial environments.

Definition and Technical Positioning of Monocrystalline Silicon Pressure Transmitters

A monocrystalline silicon pressure transmitter is a pressure measurement device that uses monocrystalline silicon material as the core sensing element, converts pressure signals into electrical signals through micromechanical processing technology, and outputs standard industrial signals.

Compared with traditional pressure sensing technologies, monocrystalline silicon sensors have significant advantages in the following aspects:

Highly consistent mechanical properties
Stable stress-to-electrical signal conversion characteristics
Minimal long-term zero drift and sensitivity drift

Therefore, monocrystalline silicon pressure transmitters are typically used in industrial applications with high requirements for accuracy, stability, and reliability.

Working Principle Analysis

The Nexisense monocrystalline silicon pressure transmitter achieves pressure measurement based on the piezoresistive effect and a fully isolated pressure transmission structure.

The measured medium acts on the process connection port. Through a dual-diaphragm structure and internally filled inert transmission fluid, the pressure is evenly transmitted to the monocrystalline silicon pressure sensing chip. The piezoresistive bridge inside the chip generates minute electrical signal changes under pressure, which are amplified, compensated, and linearized by high-performance signal conditioning circuits, and finally output as a standard 4–20 mA DC signal or a digitally superimposed signal.

The fully sealed and fully isolated structure effectively prevents the medium from directly affecting the sensing chip, significantly reducing interference caused by temperature, static pressure, and corrosion.

Structural Composition and Design Analysis

Fully Sealed Monocrystalline Silicon Pressure Sensor
Adopting a fully sealed and fully isolated structural design combined with fill-fluid volume control technology, it effectively eliminates the influence of temperature changes and static pressure on measurement results.

The dual-diaphragm overload protection structure allows the sensor to maintain structural integrity and measurement stability under high static pressure and transient overload conditions.

Signal Transmission and Processing Module
Integrated circuits and surface-mount packaging technology form a highly reliable signal transmission module. A built-in 24-bit ADC ensures high resolution while achieving fast signal response, meeting measurement requirements under dynamic operating conditions.

Display and Human-Machine Interaction System
The display module supports 360° rotational installation to accommodate different mounting orientations.

Parameter configuration, range adjustment, and status viewing can be completed through an external button menu, providing intuitive and engineering-friendly operation.

Electrical and Mechanical Protection Structure
Transient voltage protection terminal modules effectively suppress lightning strikes, surges, and other transient interferences.
High-strength metal electrical housing combines structural robustness with industrial aesthetics.
Rugged stainless steel process flanges with ultra-thick reinforced structures adapt to high static pressure and high overload environments.

Core Features of Monocrystalline Silicon Pressure Transmitters

High Accuracy and High Stability
The inherent physical consistency of monocrystalline silicon materials enables the sensor to maintain excellent zero stability and repeatability during long-term operation, making it suitable for precision process control.

Strong Overload Resistance and High Static Pressure Capability
The dual-diaphragm structure and reinforced flange design allow the transmitter to easily withstand high static pressure and transient overload conditions, reducing the risk of accidental damage.

Excellent Environmental Adaptability
The fully isolated and fully sealed structure, combined with corrosion-resistant material selection, enables long-term stable operation in high-temperature, high-pressure, and strongly corrosive environments.

Safe Human-Machine Interaction Design
The magnetic induction isolated button structure complies with explosion-proof site safety operation standards, enabling on-site parameter configuration without compromising electrical protection ratings.

Summary of Technical Advantages

From an engineering application perspective, Nexisense monocrystalline silicon pressure transmitters demonstrate outstanding performance in the following aspects:

High-resolution measurement capability suitable for micro differential pressure and high-precision control scenarios
Excellent temperature compensation and static pressure suppression performance
Strong resistance to electromagnetic interference and surge protection capability
Robust structure suitable for long-term continuous operation

Measurement Modes and Signal Output

Monocrystalline silicon pressure transmitters can support multiple measurement modes according to application requirements:

Gauge pressure measurement
Absolute pressure measurement
Differential pressure and micro differential pressure measurement

Typical signal output forms include:

4–20 mA DC two-wire analog output
4–20 mA with superimposed digital communication signal (for parameter configuration and diagnostics)

They can be seamlessly integrated with PLCs, DCSs, and various industrial automation systems.

Typical Application Scenarios

With their comprehensive performance advantages, monocrystalline silicon pressure transmitters are widely used in:

Petrochemical process control and pipeline pressure monitoring
Micro differential pressure measurement and filtration system monitoring
High static pressure reactor and vessel pressure measurement
Gas and liquid pressure monitoring in environmental engineering
Key pressure point control in energy, power, and metallurgical industries

Frequently Asked Questions (FAQ)

Which high-demand applications are monocrystalline silicon pressure transmitters suitable for?
They are suitable for industrial applications with high requirements for accuracy, long-term stability, and overload resistance, such as micro differential pressure, high static pressure, and critical process control points.

Does on-site parameter configuration affect explosion-proof performance?
No. The magnetic induction isolated button structure enables safe and convenient on-site operation while fully complying with explosion-proof requirements.

Conclusion

Monocrystalline silicon pressure transmitters represent an important direction in the development of industrial pressure measurement toward high precision, high reliability, and high safety.

Through mature monocrystalline silicon pressure sensing technology, comprehensive signal processing, and robust structural design, Nexisense provides a stable and trustworthy pressure measurement solution for complex industrial operating conditions.

As process industries continue to pursue refined control and safe operation, monocrystalline silicon pressure transmitters are gradually becoming an important choice for high-end pressure measurement applications.