Nexisense Diffused Silicon Pressure Transmitters: The Reliable Core of Industrial Process Measurement and Control

In modern industrial automation systems, pressure is one of the most fundamental and critical process parameters, directly determining process stability, production efficiency, and equipment safety. Whether it is micro-pressure control in chemical reactors, furnace pressure monitoring in metallurgical blast furnaces, or pipeline pressure regulation in water treatment pump stations, all rely on a pressure transmitter with stable performance and fast response.

Leveraging advanced diffused silicon sensing elements, precision temperature compensation technology, and a robust all-stainless-steel structure, Nexisense diffused silicon pressure transmitters stand out in a wide range of industrial environments. They not only meet the dual requirements of high accuracy and high reliability, but also adapt to long-term operation under complex working conditions, becoming a trusted “behind-the-scenes hero” in process measurement and control systems.

Diffused Silicon Sensor Technology: The Fundamental Guarantee of Accuracy and Stability

The core of a diffused silicon pressure transmitter lies in its sensing element. Through semiconductor diffusion processes, a Wheatstone bridge is formed on a single-crystal silicon diaphragm. When pressure is applied to the diaphragm, the resistance values change; after amplification and compensation, a standard output signal is generated. Compared with traditional strain gauge or ceramic capacitive structures, this design offers higher sensitivity, lower hysteresis, and superior long-term stability.

Nexisense products use high-quality diffused silicon sensor cores combined with digital temperature compensation and nonlinear correction algorithms. Across a wide temperature range from -40°C to +85°C, both zero temperature drift and span temperature drift are controlled at extremely low levels. Actual test results show long-term stability better than ±0.1%FS per year, meaning that even after years of continuous operation, the transmitter can maintain factory accuracy without frequent recalibration, significantly reducing maintenance costs for users.

Media Compatibility and Environmental Adaptability: Solid Protection with Full Stainless Steel

Industrial process media vary widely, ranging from clean water and compressed air to corrosive acids and alkalis, oils, and even particle-laden slurries. Pressure transmitters must therefore offer strong media compatibility. Nexisense diffused silicon pressure transmitters adopt 316L stainless steel isolation diaphragms and housings, with no non-metallic materials in direct contact with the process media. This effectively prevents corrosion, leakage, and contamination risks.

With an IP65 protection rating, the transmitter reliably resists dust ingress and water jets, making it suitable for humid, dusty, or outdoor installations. EMC circuit design further enhances anti-interference performance, providing lightning protection, resistance to radio-frequency interference, and suppression of electromagnetic compatibility issues. Even in environments with variable-frequency drives, motor groups, and other strong electromagnetic sources, the transmitter delivers stable output signals.

Wide Range and Fast Response: Meeting Diverse Process Control Requirements

Nexisense offers a complete range from micro-pressure (several kPa) to ultra-high pressure (hundreds of MPa), supporting gauge pressure, absolute pressure, and differential pressure measurement. Standard outputs include 4–20 mA (two-wire), 0–5 V, and 0–10 V, ensuring compatibility with most PLC, DCS, and field instrumentation systems.

Typical response times are in the millisecond range, enabling real-time capture of transient pressure fluctuations. This is especially important for applications requiring rapid regulation, such as hydraulic load changes or pump start-stop pressure shocks. The products also feature 150%FS overload capacity and 200%FS burst pressure, along with short-circuit and reverse-polarity protection, greatly enhancing survivability under unexpected operating conditions.

Typical Application Scenarios: Comprehensive Empowerment from Pump Stations to Production Lines

Water Treatment and Pump Station Systems  In water supply networks and wastewater treatment pumping stations, diffused silicon pressure transmitters are installed on inlet and outlet pipelines and pump outlets to monitor pressure changes in real time. By linking with variable-frequency drives, constant-pressure water supply can be achieved, significantly reducing energy consumption and extending pump service life.

Chemical and Petrochemical Process Control  Reactors, storage tanks, and pipelines demand high accuracy and corrosion resistance for pressure monitoring. In these applications, Nexisense products provide stable signals and support remote data acquisition and alarm settings via upper-level systems, ensuring process safety.

Hydraulic and Machinery Manufacturing  Hydraulic presses, injection molding machines, and stamping equipment require extremely fast pressure response. Fast-response diffused silicon pressure transmitters accurately capture peak pressures, helping optimize control logic and improve product consistency.

Metallurgy and Energy Industries  For blast furnace pressure, steam pipelines, and cooling water systems operating under high temperature and high pressure, wide temperature compensation and high stability become key advantages.

Installation and Maintenance Recommendations

When selecting installation locations, avoid strong vibration sources, direct sunlight, and areas with extreme temperature differences. Stainless steel flexible hoses or impulse tubing are recommended at process connections to reduce pressure shocks. Zero calibration should be performed before commissioning, and accuracy verification is recommended annually or after major process adjustments. Thanks to solid-state design and high-quality components, this product series offers long mean time between failures and low on-site maintenance requirements.

Frequently Asked Questions (FAQ)

1. What are the advantages of diffused silicon pressure transmitters compared with ceramic capacitive types?  Diffused silicon offers higher sensitivity, lower temperature drift, and better long-term stability, making it suitable for most industrial processes. Ceramic capacitive sensors are more resistant to extremely aggressive corrosive media.

2. What output signals and communication methods are supported?  Standard 4–20 mA output is available, with optional voltage outputs. Some models also support HART or RS485 digital communication.

3. How should I select a model for high media temperatures?  Models with heat dissipation fins or remote diaphragm seals can be selected to isolate the sensing element from high-temperature media.

4. How do I determine whether differential pressure measurement is required?  Choose differential pressure types for liquid level, flow measurement, or filter differential pressure monitoring. For general pipeline pressure, gauge or absolute pressure types are sufficient.

5. How is anti-interference performance ensured?  Built-in EMC protection circuits and compliance with industrial-grade anti-interference testing ensure reliable operation in strong electromagnetic environments.

Conclusion: Precision Control Starts with Pressure

In the era of Industry 4.0 and intelligent manufacturing, process control places ever-higher demands on the accuracy, stability, and adaptability of measurement devices. With advanced sensor technology, robust mechanical design, and reliable electrical performance, Nexisense diffused silicon pressure transmitters provide efficient and cost-effective pressure monitoring solutions for chemical processing, metallurgy, water treatment, hydraulics, and many other industries.

Choosing a truly reliable pressure transmitter is not just about acquiring data—it is a strategic investment in process continuity, energy optimization, and safety enhancement. If your project is facing pressure measurement upgrades or system stability challenges, we invite you to explore the Nexisense product range in depth—so that every pressure change becomes a reliable basis for production decisions.