In the field of liquid level measurement for extremely corrosive media such as strong acids and strong alkalis, the PTP602 anti-corrosion level transmitter has attracted considerable attention thanks to its ceramic anti-corrosion technology. This article focuses on testing the performance of this product in a 98% concentrated sulfuric acid environment, and provides a comparative analysis with similar products such as PTG602 and LMK858, offering key selection reference for industrial users.

I. Definition and Overview: The Core Value of Anti-corrosion Level Transmitters

Anti-corrosion level transmitters are critical equipment in industries such as chemical processing, electroplating, and pharmaceuticals. Their core function is to achieve accurate liquid level monitoring in highly corrosive media such as strong acids (such as 98% concentrated sulfuric acid) and strong alkalis. The PTP602 adopts an alumina ceramic sensor and a polytetrafluoroethylene sealing structure, and has passed ISO 15848 fugitive emission certification, enabling it to withstand extreme environments with a pH value of 0-14. Compared with traditional metal materials, ceramic anti-corrosion technology extends service life by more than 3 times, while avoiding the risk of media contamination caused by material corrosion.

II. Technical Performance Test: Ultimate Challenges in a 98% Concentrated Sulfuric Acid Environment

In laboratory simulation tests, after the PTP602 was continuously exposed to a 98% concentrated sulfuric acid environment for 30 days, its key performance parameters still remained at an industry-leading level: measurement accuracy was stable at ±0.25%FS (full scale), response time was ≤50ms, and temperature drift was controlled within 0.01%/℃. Comparative tests showed that the similar PTG602 exhibited slight swelling of the sealing ring under the same conditions, while the ceramic coating of the LMK858 began to develop microscopic cracks on the 25th day. This result confirms the advantages of the PTP602 in material formulation and structural design.

III. Procurement and Selection Guide: Five Key Evaluation Dimensions

For strong acid liquid level measurement scenarios, it is recommended to evaluate equipment selection from the following dimensions: 1) corrosion resistance rating (must pass ASTM G31 accelerated corrosion testing); 2) media compatibility (special media such as concentrated sulfuric acid and hydrofluoric acid require separate verification); 3) process connection method (PVDF or PTFE is recommended for flange materials); 4) explosion-proof certification (chemical industry scenarios must meet ATEX or IECEx standards); 5) long-term stability (refer to data with MTBF ≥100,000 hours). The PTP602 meets industrial-grade requirements in all these dimensions, and its modular design also allows customization of electrode length and output signal type according to operating conditions.

IV. Industry Application Case: Successful Practice of a Chemical Enterprise

After a large sulfuric acid manufacturer replaced its original CYB-31MS transmitter with the PTP602, it achieved significant benefits: the failure rate of the measurement system was reduced by 82%, and annual maintenance costs were saved by 150,000 yuan. Under complex operating conditions with concentration fluctuations (92%-98%) and temperature changes (20-80℃), the equipment still maintained 0.3 class accuracy. By contrast, the DLK208 tested during the same period showed signal drift when the concentration was >95%. This case proves that in ultra-high-concentration acid liquid measurement, the reliability of ceramic anti-corrosion technology is significantly superior to the traditional stainless steel + lining solution.

V. Why Choose Xi'an Shenghongchuang Instrumentation

As a national high-tech enterprise, we have 20 years of experience in the R&D of special-purpose sensors: 1) our proprietary ceramic sintering process enables the density of the anti-corrosion layer to reach 99.6%; 2) every PTP602 undergoes a 72-hour concentrated sulfuric acid immersion test before leaving the factory; 3) we provide an extended 3-year warranty and 48-hour emergency response service; 4) we support retrofit and upgrade of legacy equipment such as the SY2088F model. The production base in Xixian New Area is equipped with a CNAS-certified laboratory, allowing us to customize solutions for special operating conditions such as resistance to hydrofluoric acid and mixed acids.

If you need complete comparative data for the PTP602 and models such as CL194 and LC-503, or would like to consult on an exclusive configuration solution for 98% concentrated sulfuric acid scenarios, please contact our engineering and technical team immediately. Click the online customer service on our official website or call 400-xxx-xxxx to receive the White Paper on Liquid Level Measurement for Highly Corrosive Media and customized selection tools free of charge.