Analysis of the 3 Major Core Disadvantages of Diffused Silicon Pressure Transmitters

When purchasing BP-A pressure transmitters，the performance defects of diffused silicon sensors are often overlooked。This article provides an in-depth analysis of the 3 major core disadvantages of diffused silicon pressure transmitters such as DG1300-BZ-A，helping contract executors avoid procurement risks。As a professional sensor manufacturer，Shenghongchuang specifically reveals the key shortcomings of diffused silicon technology in practical applications，helping you make wiser purchasing decisions。

1、Temperature Drift Issues：Accuracy Is Difficult to Maintain Long-Term Stability

The most prominent issue of diffused silicon sensors lies in their temperature sensitivity。Taking the DG1300-BZ-A-0.4/CJ/AE/FZ/W pressure transmitter as an example，its zero temperature drift can reach ±2%FS，which means that within the operating temperature range of -40～85℃，the measured value may have significant deviations。For industrial scenarios with large temperature differences such as petroleum and chemical industries，this characteristic can lead to：

1. Frequent on-site calibration is required，increasing maintenance costs
2. Long-term stability is only ±0.2%FS/year，lower than the ±0.1% standard of capacitive sensors
3. Under extreme temperatures（such as high-temperature pipelines in power plants），sensitivity drift will be further amplified

In comparison，Domestic Level Transmitter HDP601adopts a three-stage lightning protection module and laser trimming temperature compensation technology，which can control drift within ±0.5%FS within the -10～70℃ compensation range，making it more suitable for urban water supply systems that require stable measurement。

2、Limitations in Media Compatibility：A Fatal Weakness in Corrosive Environments

The diffused silicon chip used in the BP-A pressure transmitter has extremely high requirements for media purity。Our laboratory tests show that the failure rate increases significantly when measuring the following media：

Although models such as MBS33M-060G312 claim to use a 316L stainless steel housing，their core sensing units still cannot avoid media permeation issues。The HDP601 level sensor with a fully sealed stainless steel structure can better cope with corrosive environments in hydrological exploration。

3、Insufficient Overload Resistance：Safety Hazards Under Sudden Operating Conditions

The overload pressure of diffused silicon sensors is usually only 150%FS，when water hammer effects or pressure shocks occur：

• After the M5156-000005-016BG model is overloaded at 125%FS，its linearity drops to Class 0.8
• Repeated overloads can cause the piezoresistive bridge arms of diffused silicon to fracture，resulting in permanent damage
• The safety margin of explosion-proof pressure transmitters is further reduced

For critical facilities such as reservoir dams，we recommend sensor solutions with an overload capacity of up to 200%FS and reverse polarity protection。For example，in wind power construction，only sensors with 100g shock resistance can meet the requirements of tower vibration monitoring。

Professional Advice：How to Choose Alternative Solutions

In view of the inherent defects of diffused silicon sensors，contract executors should focus on the following when purchasing：

1. Accuracy Verification：Require suppliers to provide third-party test reports，especially accuracy curves at different temperatures
2. Media Adaptation：Confirm the chemical compatibility between the sensor and the measured medium，and request material certification when necessary
3. Dynamic Response：Check whether the fast response capability of ≤1ms meets the requirements of the operating conditions

As a manufacturer with 15 years of sensor R&D experience，Xi'an Shenghongchuang can provide you with customized pressure measurement solutions。Whether it is the special certification requirements of the DH-HXM explosion-proof model or the multi-parameter integration requirements of the MBS1900 series，we can provide professional products that comply with ISO9001 standards。

Contact our technical team now，to obtain sensor selection solutions and performance comparison data tailored to your specific operating conditions。Let us use our professional experience to help you avoid procurement pitfalls and choose truly reliable measurement equipment。