Comparison of the Core Performance of Diffused Silicon Pressure Sensors Under High-Temperature Operating Conditions

In high-temperature industrial scenarios such as petrochemicals, power, and metallurgy, the stability and accuracy of pressure sensors are directly related to production safety. As a flagship model of Xi'an Shenghongchuang Instrumentation Co., Ltd., MBS33-060G3089 adopts diffused silicon Hesseman technology, and its medium temperature resistance can reach 150℃, far exceeding the 80℃ limit of traditional ceramic capacitive sensors. This article will analyze its differentiated advantages over similar products from three dimensions: material science, signal processing, and operating condition adaptability.

I. Breakthroughs in High-Temperature-Resistant Materials and Structural Design

The MBS33 series adopts a composite structure of a single-crystal silicon chip and a 316L stainless steel diaphragm, achieving stress matching through a high-temperature solid-state diffusion process. Experimental data show that in a continuous operating environment of 200℃, its zero-point drift is only ±0.1%FS/℃, showing a clear advantage over the ±0.3%FS/℃ commonly seen in competing products. Key components use Hastelloy C seals to avoid the risk of medium leakage caused by O-ring aging under high temperatures.

• Sensor chip: Single-crystal silicon piezoresistive element with laser trimming compensation, temperature drift coefficient <0.02%/℃
• Isolation diaphragm: 3μm-thick 316L stainless steel coating, corrosion-resistant while maintaining high sensitivity
• Filling fluid: High-temperature silicone oil (-40℃~200℃), ensuring pressure transmission stability

By contrast, although the ceramic capacitive technology used by a certain German brand can achieve an accuracy of ±0.075% at room temperature, after exceeding 100℃, changes in its dielectric constant will cause nonlinear errors to increase sharply. And although the domestic capacitive pressure transmitter PDS453 has passed IEC explosion-proof certification, its polyphenylene oxide resin housing may develop coating cracks under sustained high-temperature operating conditions.

II. Signal Processing Capability in Extreme Environments

MBS33-060G3089 has a built-in ASIC chip to achieve digital temperature compensation, dynamically correcting thermally induced errors through a real-time sampling rate of 32 times/second. Its 4~20mA+HART protocol output has signal attenuation of no more than 0.05% within a transmission distance of 200 meters, making it particularly suitable for scenarios with strong electromagnetic interference such as boiler rooms and cracking furnaces. Tests show that after continuous operation for 1000 hours at an ambient temperature of 85℃, its full-scale accuracy still remains at ±0.15%FS.

III. Full Life Cycle Cost-Benefit Analysis

Although the initial purchase price of the MBS33M-060G3129 pressure transmitter is 15%-20% higher than ordinary models, its 6-year maintenance-free design can reduce operation and maintenance costs by 60%. Taking the pressure monitoring of reactors commonly found in the petrochemical industry as an example:

1. Installation cost: Standard 1/2" NPT thread, compatible with existing pipelines without modification
2. Calibration cycle: With repeatability of ±0.05%, the annual inspection interval can be extended to 24 months
3. Failure rate comparison: Field statistics show that its MTBF reaches 150,000 hours, 3 times higher than competing products

For budget-sensitive projects, the economical configuration of the DH-HXM pressure transmitter can also meet basic needs, but its silicone oil filling system will exhibit slight seepage when exceeding 120℃, requiring periodic medium replenishment.

Professional Purchasing Recommendations and Industry Application Cases

Based on Xi'an Shenghongchuang's implementation experience in the Shaanxi Coal Group project, we recommend evaluating diffused silicon Hesseman pressure sensors according to the following criteria:

• High-temperature adaptability: Check whether the sensor has passed IEC 60751 Class A certification
• Explosion-proof requirements: Intrinsically safe Ex ia II CT6 or flameproof Ex d II CT6 certification
• Medium compatibility: It is necessary to confirm whether the diaphragm material can withstand acidic/alkaline media

After a certain ethylene cracking unit adopted MBS33-060G3089 to replace the original imported sensor, it not only shortened the temperature measurement response time from 3 seconds to 1.2 seconds, but also achieved real-time interfacing between pressure data and the DCS system through the HART protocol, saving more than 120,000 yuan annually in manual inspection costs.

IV. After-Sales Service and Technical Support Assurance

As a high-tech enterprise, Xi'an Shenghongchuang provides an extra-long 36-month warranty and is equipped with a dedicated engineer team. In response to the special requirements of high-temperature operating conditions, we can provide:

• On-site thermal stress simulation analysis service
• Customized temperature compensation parameter settings
• Commitment to spare parts replacement within 48 hours in emergencies

If you need to evaluate the specific performance parameters of the MBS33M-060G1655 pressure transmitter, our technical team can provide free sample testing and operating condition adaptation solutions.

Conclusion

In harsh environments of high temperature and high pressure, the MBS33-060G3089 diffused silicon pressure sensor has become the preferred solution in industries such as power and petrochemicals by virtue of its material innovation and intelligent compensation algorithm. Its 40:1 range ratio and ±0.1% accuracy far exceed those of conventional models such as MBS33-060G3043. If you need a detailed technical white paper or price list, please contact our engineering service hotline immediately.

Further reading:For scenarios requiring both pressure and flow monitoring, it can be used together with the domestic capacitive pressure transmitter PDS453 to build a complete measurement system. This product has been successfully applied in the PetroChina West-East Gas Pipeline II project.