In extreme industrial environments such as strong acids and strong alkalis, how does the BXY620F liquid level sensor achieve long-term stable operation through ceramic anti-corrosion technology? As a professional anti-corrosion submersible level transmitter, it adopts special materials and structural design to accurately measure the liquid level of highly corrosive media such as sulfuric acid and hydrochloric acid. This article will provide an in-depth analysis of the anti-corrosion principles and selection points of PTB603,HJ833 and other series products, helping engineering contractors choose the most suitable solution.

I. Challenges of Strong Acid and Strong Alkali Environments to Liquid Level Sensors

In industries such as chemical processing,electroplating,and pharmaceuticals, strong acids (such as sulfuric acid and hydrochloric acid) and strong alkalis (such as sodium hydroxide) are extremely corrosive to traditional metal sensors. Ordinary 304 stainless steel can develop perforation failure within just a few weeks in environments where the pH value is lower than 2 or higher than 12. According to data from NACE, the global annual direct economic losses caused by equipment corrosion exceed 2.5 trillion US dollars.

The BXY620F anti-corrosion submersible level transmitter uses an aluminum oxide ceramic sensing diaphragm with a Mohs hardness of 9 (second only to diamond), capable of resisting long-term corrosion from 98% concentrated sulfuric acid and 40% sodium hydroxide. Similar to products in the PTB603,LMP836 and other series, its core anti-corrosion performance is achieved through the following three dimensions:

• Material selection: Ceramic/PTFE composite structure, resistant to the PH value range of 0-14
• Sealing process: Laser welding combined with fluororubber O-ring, achieving IP68 protection grade
• Electrical isolation: Ceramic capacitive principle avoids electrolytic corrosion, accuracy ±0.25%FS

1.1 Breakthrough Application of Ceramic Anti-Corrosion Technology

The BXY620F series developed by Xi'an Shenghongchuang adopts third-generation ceramic sintering technology. The α-alumina crystal structure formed at a high temperature of 1450℃ has chemical inertness far superior to Hastelloy. Actual test data shows that after continuous operation for 5000 hours in a 30% hydrochloric acid solution at 80℃, the sensor zero drift remains less than 0.1%. This characteristic has also been verified in models such as EVT-300B and CYT-152.

II. Key Selection Parameters and Engineering Matching

When selecting equipment such as the AC-L3 anti-corrosion level transmitter, contract engineers need to focus on the following technical indicators:

2.1 Principles for Matching Medium Characteristics

Different corrosive media have specific requirements for materials. For example, hydrofluoric acid corrodes glass and ceramics, so the TS303 model with a fully PTFE-wrapped structure should be selected; while for 93% sulfuric acid, the ceramic diaphragm solution of HJ833 is more cost-effective. It is recommended to select according to the medium concentration-temperature comparison table, for example:

1. ≤40% hydrochloric acid: all ceramic/PTFE models are applicable
2. ＞60% nitric acid: only ceramic models such as BXY620F are applicable
3. Media containing solid particles: LMP836 models with flushing interface should be selected

2.2 Installation Method and Process Connection

The flange material of the anti-corrosion submersible level transmitter needs to match the piping system. For customized models such as PTB603, PTFE-lined flange options from DN50-DN150 can be provided. In the chlor-alkali industry, the cantilever installation of EVT-300B is recommended to avoid sediment accumulation affecting measurement accuracy.

III. Full Life Cycle Maintenance Strategy

Even high-performance sensors such as CYT-152 require a scientific maintenance plan to ensure a 10-year design life:

• Preventive maintenance: Check the aging condition of seals every 6 months
• Calibration cycle: Annual recalibration is recommended for strong acid environments
• Fault diagnosis: When the output current is abnormal, prioritize checking the cable sheath

Xi'an Shenghongchuang provides a three-year warranty for products such as PRC-918, and explosion-proof versions (Ex d IIC T6) can also be customized according to user requirements.

IV. Summary and Professional Recommendations

Under highly corrosive working conditions, the BXY620F liquid level sensor achieves a balance between measurement accuracy and durability through ceramic material innovation and structural optimization. Compared with models such as T-51B and AC-L3, its performance is particularly outstanding in ultra-strong acid environments. It is recommended that engineering contractors, when selecting models:

1. Clarify the chemical composition and concentration gradient of the medium
2. Consider the impact of temperature and pressure on material resistance
3. Give priority to products certified to SIL2

As a leading sensor manufacturer in Northwest China, Xi'an Shenghongchuang can provide working condition adaptation test reports for the full range of products such as HJ833 and LMP836. Contact our technical engineers now to obtain customized solutions and quotation lists.