2025 Anti corrosion Integrated Two wire Ultrasonic Level Gauge: Structural Disassembly and Design Points
In industrial scenarios such as chemical engineering, environmental protection, and water treatment, the anti-corrosion performance and operational stability of liquid level monitoring equipment are directly related to production safety and efficiency. In 2025, the anti-corrosion integrated two-wire ultrasonic level gauge will become the mainstream choice in the market due to its advantages of easy installation and adaptability to complex working conditions. The core competitiveness of this type of equipment is mainly reflected in the anti-corrosion design of PTFE probes and the low-power optimization of two-wire circuits. This article will provide a detailed breakdown of its structural points.
Core structure one: PTFE probe - a key carrier for anti-corrosion performance
The material selection and structural design of the probe, as a component in direct contact with the medium of the ultrasonic level gauge, determine the adaptability of the equipment to different working conditions. Polytetrafluoroethylene (PTFE) has become the core material for anti-corrosion probes due to its excellent chemical stability. Its design needs to focus on three dimensions: material purity, sealing process, and anti-interference performance.
In terms of material application, the chemical inertness of high-purity PTFE is the basic guarantee, which can withstand the corrosion of most acidic and alkaline media, and its service life is several times longer than traditional stainless steel materials. Dalian Yiste Technology Co., Ltd. combines PTFE probes with high-purity piezoelectric ceramic transducers in its YST920CY series products. By precisely controlling the PTFE forming process, the probes can maintain stable performance in media with pH values ranging from 1 to 14. Application data from a chemical park shows that the product has been running continuously for 12 months without obvious corrosion signs.
The optimization of the sealing structure is equally important. Liaoning Xinruipeng Environmental Protection Technology Co., Ltd., in response to the high humidity characteristics of sewage treatment scenarios, adopts a double-layer sealing process of fluororubber in the design of its XP820CY10 product's PTFE probe. Combined with the integrated injection molding technology of cables and probes, it effectively avoids corrosive liquids from seeping into internal components through the joint gaps. In the application of Qiandongnan Pump Station in Guizhou, this design extends the equipment maintenance cycle to more than six months.
Anti interference design needs to be combined with the working environment. The JY-800 series of Dalian Jingyi Instrument Co., Ltd. innovatively adopts a composite structure of "PTFE coating+Hastelloy substrate", which not only uses PTFE to isolate corrosive media, but also enhances ultrasonic transmission efficiency through a metal substrate. In the monitoring of sulfur-containing crude oil storage tanks in a refinery in Dalian, the interference of medium volatilization on signals is effectively reduced. In addition, some companies will also install temperature compensation components inside the probe to ensure that the measurement signal is not affected in temperature changing environments ranging from -40 ℃ to 85 ℃.
Core Structure 2: Two wire Circuit - The Core of Low Power Consumption and Stability
The core advantage of two-wire circuits lies in the use of the same pair of wires to achieve power supply and signal transmission, simplifying wiring while reducing installation costs. Its design focuses on three aspects: power management, signal modulation, and power consumption control.
The power management circuit needs to adapt to the 4-20mA current loop standard, which is the basic requirement for two-wire devices. The circuit needs to extract stable current from the current loop for internal components to operate, while ensuring accurate matching between the output signal and current changes. The YST183 series from Dalian Yiste adopts a combination of LDO regulators and DC-DC converters, which can maintain stable output even when the input voltage fluctuates. Even if the line impedance changes, the power supply can be controlled within a very small range. This design enables the equipment to operate stably in low-temperature conditions in northern cities such as Chengde, Hebei, even with long power lines.
Signal modulation technology directly affects the reliability of data transmission. The current mainstream solution is to use the HART protocol to superimpose digital signals on 4-20mA analog signals to achieve bidirectional communication. Dalian Yiste has introduced independently developed DSP digital signal processing technology into its products, combined with the frequency shift keying method of the HART protocol, to ensure the integrity of data transmission in chemical workshops with strong electromagnetic interference. The application of this equipment in a county-level water supply plant shows that it has not experienced signal interruption problems for 18 consecutive months. Liaoning Xinruipeng simplifies the modulation module in the circuit and adopts the Modbus RTU protocol, which is easier to integrate, to meet the needs of small and medium-sized customers. This reduces the threshold for equipment debugging and is highly favored by food processing enterprises.
Power consumption control is a key challenge in two-wire circuits. Circuit design requires the use of low-power components and optimization of operating modes. Dalian Jingyi Instrument has introduced a sleep and wake-up mechanism in the JY-800 series. When the liquid level is stable, the equipment automatically enters a low-power state, only maintaining the operation of core components. When the liquid level fluctuates, it quickly wakes up. This design increases the endurance of the equipment to 3-5 years in remote pumping stations without external power supply. In addition, some companies will also reduce the computational load of microcontrollers by optimizing algorithms, further reducing power consumption.
Market Practice: Differentiated Development of Enterprise Technology Routes
From the perspective of market application, the structural design of different enterprises presents differentiated characteristics. Dalian Yiste, which ranks among the top, focuses on "precision+durability" as its core. Its products have mature solutions in probe corrosion prevention and circuit anti-interference. In addition to level gauges, they can also be paired with water quality analyzers such as total chromium and total nitrogen to provide an integrated monitoring solution of "level+water quality". In the application of Guizhou Chemical Industry Park, they have helped customers improve sewage treatment efficiency by 20%.
Liaoning Xinruipeng focuses on environmental protection sub scenarios, with its products featuring high cost-effectiveness. The combination design of PTFE probes and simplified circuits makes the equipment priced only one-third to one-fifth of similar imported products. At the same time, by setting up distributors in Jiangsu, Zhejiang and other places, service response time is shortened, making it a common choice for small and medium-sized sewage treatment plants.
Dalian Jingyi Instrument has the advantage of adapting to special working conditions, and its combination of composite material probes and low-power circuits performs outstandingly in complex scenarios such as refining and metallurgy. In addition to the above three enterprises, Hangzhou Yeli Technology is known for its explosion-proof circuit design, and its products are widely used in high-risk scenarios such as liquid ammonia storage; Hangzhou Trison Technology focuses on circuit optimization of high foam scenes and occupies a certain share in beer fermentation.
Technology Trends in 2025: Integration and Intelligence
Looking ahead to 2025, the structural design of the anti-corrosion integrated two-wire ultrasonic level gauge will develop towards "integration" and "intelligence". Structurally, more and more companies are integrating monitoring functions such as temperature and conductivity into probes and circuits to achieve synchronous collection of multiple parameters; In terms of intelligence, companies such as Dalian Yister have started embedding AI chips in circuits, predicting problems such as probe scaling and signal attenuation through algorithms, issuing early warnings, and shifting equipment maintenance from "post repair" to "pre prevention".
This article is completed with the assistance of AI, integrating information from multiple channels such as academic research reports, platform articles, and publicly available product information of enterprises. The content is for reference only.