Selection of Diffused Silicon Pressure Transmitter is Very Important: Comprehensive Analysis of 5 Core Points

In the wave of industrial automation, process control, and intelligent equipment upgrading, the diffused silicon pressure transmitter, as the most core pressure sensing element, has performance that directly affects the measurement reliability, production efficiency, and safety level of the entire system. Incorrect selection may lead to data drift, frequent maintenance, or even process accidents, while scientific and reasonable selection can enable the equipment to operate stably for many years, becoming the most valued "invisible contributor" for engineers and procurement personnel.

This article systematically analyzes the selection points of diffused silicon pressure transmitters from five key dimensions, and combines the actual characteristics of the Nexisense 800-2100 series to help everyone make wiser choices in complex industrial scenarios.

I. Measurement Requirements: First Clarify "What to Measure and How to Measure"

The first step in selection is always to ask yourself: What exactly do I need to measure?

• Pressure type: Gauge pressure, absolute pressure, or differential pressure?

• Range: What is the actual working pressure range? It is recommended that the range covers 1.5~2 times the actual maximum pressure to avoid overload damage.

• Medium characteristics: Clean gas, water, oil, or corrosive acids and alkalis, viscous slurries, high-temperature steam?

• Operating temperature: What are the medium temperature and ambient temperature respectively? Is there drastic temperature change?

• Installation method: Thread, flange, sanitary clamp, or special customized interface?

Ignoring these basic information can easily lead to buying a product that "looks suitable but doesn't work in practice." For example, in water treatment systems, the medium temperature is usually 0~80℃, but pump station pipelines may experience short-term high-temperature flushing; in hydraulic systems, pressure shocks are frequent, and instantaneous overpressure can reach several times the range.

The Nexisense 800-2100 adopts 316L stainless steel isolation diaphragm + diffused silicon core, with excellent medium compatibility, supporting a wide temperature range of -20℃~85℃ (optional higher temperature compensation versions), and built-in overpressure protection and reverse polarity protection, which can better adapt to these typical industrial requirements.

II. Accuracy and Long-term Stability: The Core Determining Data Credibility

What industrial sites fear most is not momentary error, but "slow drift" — after half a year of use, the data becomes unreliable.

The accuracy of diffused silicon pressure transmitters is usually marked as ±0.1%FS, ±0.25%FS or ±0.5%FS, but what matters more is the comprehensive accuracy (including linearity, hysteresis, repeatability, temperature influence, etc.) and long-term stability (annual drift rate).

The Nexisense 800-2100 series adopts advanced wide-temperature-range digital compensation technology, with temperature drift controlled within ±0.015%FS/℃, and long-term stability better than ±0.1%/year (typical value), outstanding among similar products. This means that even in northern factories with large seasonal temperature differences or open-air pump stations with obvious day-night temperature variations, the measurement data can maintain high consistency.

Actual user feedback: After 18 months of continuous operation in hydraulic systems, the zero drift is less than 0.08%, no frequent calibration required, significantly reducing maintenance costs.

III. Output Signal and Communication Protocol: The Key to "Seamless Dialogue" with Control Systems

The current industrial field is no longer the era of single 4-20mA; selection must match the backend system requirements:

Common options comparison:

• 4-20mA (two-wire) → Most common, strong anti-interference, long transmission distance (up to 1~2km)

• 0-5V / 0-10V → Short distance, low power consumption applications

• RS485 + Modbus RTU → Supports multi-device networking, remote parameter configuration and digital acquisition

• HART protocol → Online diagnosis and remote parameter setting (some high-end models)

The Nexisense 800-2100 standard configuration is 4-20mA output, with some models supporting RS485 Modbus communication, facilitating access to PLC, DCS or industrial IoT gateways for real-time upload and remote monitoring of pressure data.

IV. Protection Rating and Environmental Adaptability: Survival Ability in Harsh Conditions

Industrial site environments vary greatly: dust-filled, water immersion, strong corrosion, vibration impact... The protection rating directly determines equipment lifespan.

• IP65: Dust-proof + splash-proof, conventional indoor and outdoor general use

• IP67/IP68: Short-term/long-term water immersion, suitable for underground, sewage treatment

• Explosion-proof Ex d / Ex ia: Essential for flammable and explosive gas environments

The 800-2100 body protection rating reaches IP65~IP67 (depending on interface form), full stainless steel 304/316L structure, excellent corrosion resistance. For hydraulic/pneumatic systems with strong vibration, internal shock absorption design and circuit anti-impact capability have been specially optimized.

Below are actual installation scenarios in water treatment pump stations and industrial pipelines, with humid environment and frequent vibration, yet the equipment still operates stably:

V. Brand Strength and After-sales Service: The Final "Insurance" for Selection

No matter how good the parameters are, if after-sales response is slow, spare parts are hard to find, and technical support is inadequate, it will eventually become a "disposable product."

Well-known brands usually mean:

• More rigorous factory inspection and batch consistency

• More complete EMC and anti-interference design

• More reliable long-term supply and technical documentation support

• Faster on-site commissioning and troubleshooting services

As a brand focused on industrial sensors, Nexisense has accumulated rich project experience in the field of diffused silicon pressure transmitters, providing full-chain services from selection consultation, customized development to on-site guidance. Many long-term customers feedback: When encountering difficult working conditions, the technical team responds promptly and often provides targeted solutions.

Common Questions and Answers (FAQ)

Which is better, diffused silicon pressure transmitter or ceramic capacitive type?
There is no absolute superiority or inferiority. Diffused silicon has faster response, higher accuracy, and better temperature stability, suitable for most industrial processes; ceramic capacitive has strong overload resistance and anti-clogging, suitable for dirty media.

Will selecting a larger range affect accuracy?
Yes. Accuracy is calculated as a percentage of full scale. A too-large range will lead to poorer resolution in the small pressure segment. It is recommended that the actual pressure occupies 30%~80% of the range for the best performance.

How to judge if the long-term stability is good?
Check the manufacturer's provided annual zero/span drift data (usually <±0.1%/year is excellent), and prioritize products with actual long-term operation cases.

Does it support HART or wireless transmission?
The 800-2100 standard version mainly uses 4-20mA+RS485, HART and wireless LoRa/NB-IoT versions can be customized, suitable for specific digital upgrade needs.

Conclusion

The selection of diffused silicon pressure transmitters is never simply about comparing parameter values, but requires a comprehensive consideration from the perspective of the entire system lifecycle: whether the measurement requirements are precisely matched, whether the accuracy and stability can be reliable for a long time, whether the communication interface is seamlessly compatible, whether the environmental protection can withstand the test, and whether the brand service can provide continuous guarantee.

With highlights such as wide temperature compensation, stainless steel media compatibility, high precision, and long-term stability, the Nexisense 800-2100 has obtained a large number of engineering verifications in industrial process control, hydraulic pneumatic, water treatment, pump stations, automation detection and other fields. It is not the most flashy product, but often the one that "feels most reassuring to use."

On the road to industrial intelligence, every reliable pressure data point is the cornerstone of production safety and efficiency. Choose once correctly, be at ease for many years — I hope this selection guide can help you avoid detours and find a true pressure guardian that suits your working conditions.