Introduction

Under the harsh operating conditions of the petrochemical industry, the selection of the MH1100 pressure transmitter directly affects production safety and efficiency. This article provides an in-depth analysis of 7 core selection factors, including medium compatibility and explosion-proof rating, for key models such as the AC-P2 series and BS-602. Among them, the 4th item, anti-pulse design, is often overlooked by technical evaluation personnel. Mastering these key points will help you accurately match the needs of petrochemical installations.

1. Medium Compatibility: The Primary Consideration in Selection

The petrochemical industry involves a variety of corrosive media, such as hydrogen sulfide and chloride ions. The diaphragm material selection of the MH1100 pressure transmitter is critically important. 316L stainless steel diaphragms are suitable for most operating conditions, but for strong acid and strong alkali environments, Hastelloy C276 or tantalum materials are recommended. Taking the AC-P2-1 pressure transmitter as an example, it adopts special coating technology and can withstand liquid corrosion with a pH value of 1-14.

Special attention should be paid during technical evaluation:

• Medium temperature range（-40℃~150℃ is the limit for standard models）
• Impact of medium viscosity on measurement accuracy（high-viscosity media require an extended diaphragm）
• Crystallization risk（the NOS-Y203 model comes with an anti-crystallization design）

2. Explosion-proof Rating: The Core Safeguard for Petrochemical Safety

According to the GB3836.1-2010 standard, petrochemical plant areas usually require at least an ExdⅡCT6 explosion-proof rating. In the MH1100 series, the JSRY-316T pressure transmitter has passed both ATEX and IECEx certifications, and its intrinsically safe design can be applied in Zone 0 areas. When selecting a model, it is necessary to clarify:

3. Accuracy Grade and Long-term Stability

Petrochemical process control usually requires a measurement accuracy of 0.1%~0.5%FS. The MH1100 adopts silicon resonant sensor technology, with an annual drift of less than ±0.1%. Comparative tests show:

• The accuracy attenuation of AC-P2-2 is only 0.03% after 3000 hours of continuous operation
• The AZ-402 pressure transmitter has passed 1 million pressure cycle tests
• The NOS-Y202 has a built-in temperature compensation algorithm, with a temperature drift error of ±0.01%/℃

4. Anti-pulse Design（The Most Easily Overlooked Key Point）

Frequent pump start-stop operations in petrochemical installations generate pressure pulses, which can damage traditional transmitters. The patented buffer structure of the MH1100 can absorb instantaneous impact pressure of 20MPa, and its technical features include:

• Multi-stage damping hole design（pulse attenuation rate ≥90%）
• Dynamic response time <5ms
• Optional pulse protector（suitable for working conditions such as reciprocating compressors）

5. Process Connection and Installation Method

According to the ASME B16.5 standard, commonly used flange specifications for petrochemical pipelines include:

• 1/2" NPT thread（applicable to the AC-P2 series）
• DN50 PN40 flange（standard configuration of BS-602）
• Sanitary clamp connection（optional for NOS-Y203）

6. Output Signal and Communication Protocol

Modern petrochemical plants require equipment to support digital communication:

• 4-20mA+HART（basic configuration）
• PROFIBUS PA（exclusive to OPEC201）
• WirelessHART（optional for JSRY-316T）

7. Environmental Adaptability and Protection Rating

Coastal petrochemical projects need to meet:

• IP67/IP68 protection rating（the entire MH1100 series meets the standard）
• 1000-hour salt spray test（compliant with ISO 9227 standard）
• -40℃~85℃ operating temperature（verified in Arctic Circle projects）

Conclusion and Action Recommendations

Choosing a pressure transmitter suitable for the petrochemical industry requires comprehensive consideration of seven major factors, including medium characteristics, safety requirements, and accuracy stability. As a national high-tech enterprise, Xi'an Shenghongchuang Instrumentation Co., Ltd. has successfully applied its MH1100 series products in large-scale projects such as CNPC and Sinopec, providing full-process services from selection consultation to installation and commissioning.

If you need detailed technical parameters or customized solutions for models such as AC-P2-1 and BS-602, please contact our engineering technical team immediately. We will provide you with professional selection support and operating condition analysis services.