Introduction

As commonly used equipment in the field of industrial automation, the JH-A pressure transmitter delivers stable performance, but engineers have found through practical testing that it has 3 typical shortcomings that require caution. This article combines the technical characteristics of diffused silicon liquid and gas pressure sensors to provide an in-depth analysis of key issues that are easily overlooked during selection, helping information researchers avoid potential risks.

3 Typical Shortcomings of the JH-A Pressure Transmitter

1. Long-term stability is significantly affected by ambient temperature

The JH-A pressure transmitter uses diffused silicon sensing technology. Although it offers advantages such as high sensitivity and fast response speed, engineers have found in practical applications that its long-term stability is easily affected by changes in ambient temperature. Especially under extreme temperature conditions （below -20℃ or above 80℃）, the sensor's zero drift and sensitivity changes become more obvious, which may lead to increased measurement errors.

By contrast, the MBS-MBS3100 pressure transmitter adopts advanced temperature compensation technology and can still maintain high measurement accuracy within a wide temperature range of -40℃ to 125℃, making it more suitable for industrial environments with significant temperature fluctuations.

2. Relatively weak overload resistance

When the diffused silicon sensing element of the JH-A pressure transmitter is subjected to pressure exceeding 150% of the measuring range, irreversible damage is likely to occur. This presents considerable risk in application scenarios with large pressure fluctuations （such as hydraulic systems, compressors, etc.）.

By contrast, the DYPT-DYPT212 pressure transmitter adopts a special overload protection design and can withstand instantaneous pressure shocks of up to 300% of the measuring range, making it more suitable for industrial applications with complex operating conditions.

3. Limited media compatibility

Although the JH-A pressure transmitter can measure a variety of liquid and gas media, its adaptability to strongly corrosive media （such as concentrated acids, concentrated alkalis, etc.） or high-viscosity media is relatively poor. Long-term contact with such media may cause corrosion or blockage of the sensor diaphragm, affecting measurement accuracy and service life.

For such special media, the CYYB-110 pressure transmitter uses special anti-corrosion materials and an isolation diaphragm design, offering better media compatibility and meeting the demanding requirements of industries such as chemical processing and pharmaceuticals.

How to Choose a More Suitable Pressure Transmitter

1. Choose based on the application environment

When selecting a pressure transmitter, the first factors to consider are the temperature range, humidity conditions, and whether there are special operating conditions such as vibration and shock in the application environment. For environments with large temperature fluctuations, it is recommended to choose products like the MBS-MBS3100 that offer excellent temperature compensation performance.

2. Choose based on media characteristics

Different media place very different requirements on pressure transmitters. For ordinary media such as air and water, the JH-A pressure transmitter can meet basic needs; however, for corrosive, high-viscosity, or particle-containing media, it is necessary to choose products like the CYYB-110 that feature special protective designs.

3. Choose based on accuracy and stability requirements

For high-accuracy measurement scenarios requiring long-term stable operation, it is recommended to choose products like the PT-R pressure transmitter, which offers a higher accuracy class and better long-term stability. Although the price may be slightly higher, it can reduce later maintenance costs.

Frequently Asked Questions

1. What is the difference between a diffused silicon pressure transmitter and a ceramic pressure transmitter?

A diffused silicon pressure transmitter （such as JH-A） features high sensitivity and fast response speed, but is relatively weaker in overload resistance and media compatibility; a ceramic pressure transmitter （such as HB-35C） offers better corrosion resistance and mechanical strength, but has a slightly slower response speed.

2. Does a pressure transmitter require regular calibration?

Yes, even for an economical pressure transmitter like the SRP-580J, it is recommended to perform calibration once a year to ensure measurement accuracy. For high-accuracy applications, the calibration interval may need to be shortened to 6 months.

3. How can you determine whether a pressure transmitter needs to be replaced?

When unstable measurement values, excessive zero drift, or failure to restore normal accuracy through calibration occur, replacement should be considered. Products such as the PT-CS pressure transmitter usually have a longer service life, which can reduce replacement frequency.

Summary and Recommendations

Although the JH-A pressure transmitter performs well in conventional applications, it has obvious shortcomings under special operating conditions such as extreme temperatures, high-pressure shocks, and corrosive media. When selecting a model, information researchers should fully consider actual application requirements and choose a more suitable product.

As a professional high-tech enterprise, Xi'an Shenghongchuang Instrument Co., Ltd. provides a wide range of pressure transmitter models from NS-P-I7 to WMB-WMB2780, capable of meeting the diverse needs of different industries. Our engineering team can provide professional selection recommendations and technical support based on your specific application scenarios.

If you would like to learn more about the technical details of diffused silicon liquid and gas pressure sensors or obtain customized solutions, please feel free to contact us at any time, and we will serve you wholeheartedly.