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Products Description
Product Definition
The Nexisense SMP4000 series general-purpose pressure transmitters are high-precision industrialdevices used for precise measurement of fluid or gas pressure. The products arewidely used in industries like petrochemical, hydropower, and mechanicalhydraulic systems. They are suitable for extreme environments and harsh working conditions. This series is designed with variousprotective features such as anti-overpressure, anti-ice blockage, and electromagneticinterference resistance to ensure long-term reliability and stable performance.
Working Principle
The working principle of the SMP4000 series pressure transmitter is based onthe characteristics of pressure sensors. When the medium applies pressure tothe sensor, the sensitive element (typically a straingauge or pressure diaphragm) deforms. This deformation is converted into an electricalsignal, which is then processed by a precise signalprocessing unit to output a standard current or voltage signal.The output signal is proportional to the input pressure, allowing for accurate pressure monitoringand control.
Structural Analysis
The SMP4000series pressure transmitter's structure is designed for durability andprecision. The main components include:
Sensor Unit: The core sensor is made of high-precision 316L stainless steel, which is resistant to corrosion and suitable for high-pressure environments. Thesensitive diaphragm or strain gauge is centrally located to capture pressure changes.
Signal ProcessingUnit: The circuit board processes the signals generated by the sensor, ensuring stability and minimizingenvironmental influences. The PCB design is shockproof and vibration-resistant, ensuring long-termstable operation.
Enclosure: The housing is made of fullstainless steel, offering high resistance to corrosion, making it suitable for harsh environments. Two protection levels, IP65 (plug-in type) and IP68 (cable type), areavailable based on different applications.
Seals and Cables: The sealing ring is made from fluororubber, which is highlyresistant to chemical corrosion. The cable is madeof polyethylene, meeting the electrical requirements of high-pressure environments.
Measurement Methods
The Nexisense SMP4000 seriespressure transmitters offer various measurement methods to adapt to different industrial applications:
Gauge Pressure: Used for measuring the pressurerelative to atmospheric pressure, suitable forgeneral pressure monitoring.
Absolute Pressure: Used formeasuring absolute pressure, not influenced by atmospheric pressure, suitable for precise control andexperiments.
Sealed GaugePressure: Used for applications where pressure is sealed and independent of atmospheric pressure.
TechnicalParameters
| Parameter | Specification |
|---|---|
| Measuring Range | -0.1MPa ～ 250MPa |
| Overload Capacity | 2x(for ranges ≤ 70MPa),1.5x (for ranges> 100MPa) |
| Pressure Type | Gauge Pressure, Absolute Pressure, Sealed Gauge Pressure |
| OutputSignal | 4-20mA DC (two-wire),0/1V to 5/10V DC (three-wire) |
| Power Supply | 9-30V DC(current type), 12-30V DC (voltage type) |
| Accuracy | ±0.1% FS (min),±0.25% FS (typical), ±0.5% FS (max) |
| Zero Temperature Coefficient | ±0.03%FS/°C (≤ 100kPa), ±0.02% FS/°C (>100kPa) |
| Span Temperature Coefficient | ±0.03% FS/°C (≤ 100kPa),±0.02% FS/°C (>100kPa) |
| Long-Term Stability | ±0.2% FS/year (max) |
| Applicable Media | Various fluids compatible with 316L stainless steel and fluororubber |
| WorkingTemperature | Compensated Temperature: -10°C to +80°C;Medium Temperature: -30°C to+80°C |
| Protection Rating | IP65 (plug-in type), IP68 (cable type) |
Application Fields
The SMP4000 series pressure transmitters are widely used inmultiple industries, especially in fields thatrequire high-precision pressure measurement.Main applications include:
Petrochemical Industry:Used for pressure monitoring in oil andgas extraction, chemical production, andpetrochemical equipment.
WaterConservancy, Hydrology, and Hydropower: Used in monitoring pressure in reservoirs, rivers, andpump stations.
Mechanical Hydraulic Systems: Usedfor pressure measurement in hydraulic systems to ensure stable operation.
CNG/LNG Industry: Used in pressure measurement fornatural gas and liquefied naturalgas systems, ensuring safety in gastransportation.
Marine Industry: Used for pressure monitoring in marineequipment to prevent leaks and accidents.
Selection Guide
To choose the right SMP4000 series pressure transmitter for your application, consider the following factors:
Output Signal: Choose the appropriate output type (current type or voltage type) based on your controlsystem.
Measuring Range: Select the pressure range thatsuits your measurement needs.
StructuralMaterials: Choose 316L stainless steel or other custom materialsdepending on the corrosiveness of theworking environment.
Additional Features: Choose configurations such as Hermetic connectors or cable connectors based on installation requirements.
For example, if your application requires low-pressuremeasurement and current output signal, you can select the model: SMP4000-[0～100]kPa-E-22-B1.
Summary
The Nexisense SMP4000 series general-purpose pressure transmittersstand out for their outstanding performance and reliability, making them an indispensable pressure measurementtool in various industries. Their multi-protective design, including anti-overpressure, anti-ice blockage, and anti-electromagnetic interference, ensures stable operation in complex environments. The stainless steel structure and precision sensors, combined withstrict quality control and international certifications, make the SMP4000 series highly competitive in the market. Whether in petrochemical, marine, or hydropower industries,the SMP4000 series provides high-precision pressure measurement to ensure thesafety and reliability of systems. ChooseNexisense SMP4000 seriespressure transmitters for accurate pressuremonitoring solutions for your work environment.
