Customer Cases
Typical applications of Dayu products across industries
Featured Cases
Ultrasonic Externally Mounted Level Switch Applied to Intelligent Retrofit Project of Cylindrical Capsule-Type Oil Conservators in Power Systems
In the operation of power systems, the safe and stable operation of main transformers is of paramount importance. As a critical component of transformers, the oil conservator (oil pillow) requires precise oil level monitoring, which directly affects the transformer's service life and grid safety. Recently, Dayu Electronics successfully applied its independently developed ultrasonic externally mounted level sensor to the intelligent retrofit project of 6 imported cylindrical capsule-type oil conservators at an overseas substation.
2026/8/3
Application Case Study of Dayu Electronics Hydrophones in Underwater Pipeline Leak Detection
I. Background: This originates from the safety maintenance needs of pipeline systems in complex underwater environments, including offshore oil and gas development, urban water supply, and subsea transportation. As underwater pipelines continue to expand in scale, traditional manual diving operations face challenges such as depth limitations, high safety risks, and short operational windows, while optical detection methods often fail in turbid water due to poor visibility. Consequently, underwater inspection robots equipped with multiple sensors have emerged to replace humans in performing tasks such as inspecting inner and outer pipe walls, locating leaks, cleaning, and simple repairs under deep-sea, strong current, low-temperature, and zero-visibility conditions, thereby improving inspection efficiency and safety, and serving as critical technical equipment for ensuring the long-term reliable operation of underwater pipelines. Installing hydrophones on underwater pipeline inspection robots
2026/7/10
Dayu Electronic Ultrasonic Open Channel Flowmeter Application Case: Flow Monitoring Retrofit of Outfall Pipeline in Xinjiang
I. Project Overview 1. Monitoring Requirements: The customer needed uninterrupted 24/7 flow data collection from the outfall pipeline, with remote wireless transmission of flow data for water resource accounting, discharge control, and environmental compliance record-keeping. The equipment had to be stable and reliable, suitable for the arid outdoor environment of Northwest China, and capable of long-term unattended operation. 2. Initial Selection: Dayu Electronic Ultrasonic Doppler Pipe Flowmeter 3. Final Implemented Solution: Dayu Electronic Wireless Non-Contact Ultrasonic Open Channel Flowmeter (with standardized flow-measuring weir/flume retrofit) as shown: II. On-Site Conditions and Initial Equipment Fault Issues The discharge water at the site was clear, with extremely low levels of suspended sediment and fine particulate matter, lacking sufficient ultrasonic reflection media.
2026/7/7
Application Cases of Dayu Electronics IP68 Ultrasonic Water Level Meter in Various Humid Environments
In scenarios such as sewer manholes, reservoirs, and natural rivers, the highly humid, moisture-laden, enclosed, and dim working conditions can easily cause issues like water ingress, moisture accumulation, difficult commissioning, and data drift in monitoring equipment, making it hard for ordinary level meters to operate stably. Therefore, the core of selection in humid environments lies in the sealing protection rating, environmental adaptability, and commissioning convenience. To address various complex humid monitoring scenarios, Fuzhou Dayu Electronics has developed the IP68 Ultrasonic Water Level Meter, which adopts a fully sealed integrated protective structure to completely isolate water vapor and moisture intrusion. It can operate stably for long periods in high-humidity, underground, and open-air water-contact environments, eliminating failures caused by moisture and shortened service life, making it suitable for harsh outdoor and underground monitoring scenarios. Core Advantage 1: IP68 fully sealed integrated protection, unaffected by deep water immersion.
2026/7/7
Dayu Electronics Ultrasonic Level Difference Meter Installation Guidance Case at a Wastewater Treatment Plant in Sichuan
In municipal wastewater treatment systems, the screen chamber is the first line of defense for intercepting suspended solids and protecting pumps and downstream treatment units. To ensure that the screen machine operates automatically and efficiently based on the water level difference between the front and back, enabling precise removal of screenings, stable and reliable level measurement is crucial. Recently, the Dayu Electronics technical team visited a large wastewater treatment plant in Sichuan and successfully completed on-site installation guidance and commissioning of the ultrasonic level difference meter, effectively solving the challenge of balanced level measurement before and after the screen, providing solid support for the intelligent operation of the plant.
2026/7/6
Dayu Electronics Bridge Scour Monitoring Sensor Application Case at Yaohe, Gansu
I. Project Background Located in Pingliang City, Yaohe in Gansu is a tributary of the Jinghe River. The basin experiences significant seasonal precipitation variations, with flood season (July–September) rainfall accounting for over 60% of the annual total. During flood periods, flow velocities can reach 3.5 m/s, and the water carries large amounts of sediment and gravel, posing a serious scour risk to bridge foundations along the river. Previously, bridge maintenance units relied primarily on a traditional monitoring model of “quarterly manual underwater inspection + flood-season surface echo sounding,” which presented three core challenges: First, during flood season, the turbulent, high-sediment flow made underwater operations extremely hazardous, preventing real-time monitoring; second, manual measurements produced highly scattered data, making it difficult to capture the dynamic evolution of scour holes, and two traffic control incidents occurred due to delayed warnings; third, monitoring costs were high, with annual underwater inspection costs exceeding 180,000 RMB per bridge.
2026/7/6
Dayu Electronics Open Channel Flowmeter Application Case at Jiaozuo Wastewater Treatment Plant Inlet and Outlet
I. Project Background: Jiaozuo Wastewater Treatment Plant has a designed treatment capacity of 120,000 m³/d, primarily serving urban domestic sewage and industrial wastewater from three industrial parks. The effluent complies with the Grade A standard of the "Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants." Before the plant's upgrade in 2025, two major pain points existed in flow monitoring at the inlet and outlet: Inlet: The original in-line electromagnetic flowmeter had a maximum measurement error of 18% due to long-term non-full-pipe flow and large amounts of floating debris, failing to provide accurate data for process adjustment. Outlet: The original open channel lacked standardized flow measurement facilities, making manual flow measurement inefficient and data delayed, unable to meet the real-time flow upload requirements of environmental authorities.
2026/6/2
Dayu Electronics: Practical Application of Ultrasonic Rail Monitoring Technology on the Chengdu Railway Section
As the direct carrier of train operation, the internal health of the rail directly affects the safety and efficiency of railway transportation. Ultrasonic rail monitoring and inspection technology is an important non-destructive testing method that utilizes the propagation and reflection characteristics of high-frequency sound waves in the rail to accurately detect internal defects such as cracks and porosity. In recent years, ultrasonic guided wave technology, as the mainstream direction, has broken through the limitations of traditional methods and achieved long-distance online monitoring of up to 10 kilometers, becoming one of the core means to ensure the safe operation and maintenance of railways.
2026/6/1
Dayu Electronics Handheld Ultrasonic Depth Sounder Application Case for Water Level Measurement in Bridge Cofferdam Tubes
In deep-water foundation construction within steel pipe pile cofferdams, ensuring the safety of the cofferdam structure is the foremost prerequisite for project progress. During construction, the water level inside the tubes is typically pumped down to the design elevation of -4.3 meters, after which the water level inside the tubes and the changes in the tube bottom elevation are monitored daily. Throughout the entire cofferdam construction period, the difference between the water level inside the tubes and the external river water level (i.e., the "hydraulic head difference") must be closely monitored at all times. If the hydraulic head difference becomes too large, the severe imbalance between internal and external pressure can easily lead to structural deformation of the cofferdam, joint leakage, and in severe cases, catastrophic safety accidents such as piping. Therefore, accurate and real-time water level data is the core basis for guiding on-site construction and ensuring the safety of personnel and equipment. Portable handheld ultrasonic depth sounder: a flexible and efficient mobile measurement solution for cofferdams
2026/6/1
Dayu Electronics Case Study: Application of Externally Mounted Ultrasonic Level Sensor on Bellow-Type Oil Conservator
1. Background: The application of externally mounted ultrasonic level gauges on transformer oil conservators is primarily aimed at solving long-standing pain points of traditional invasive oil level gauges, such as "false oil level," oil leakage, difficult maintenance, and high retrofit costs. Traditional solutions are prone to serious inaccuracies due to issues like stuck floats or blocked breather pipes, while open-hole designs cannot avoid leakage risks from seal aging. This is especially critical for aging transformers or key equipment that cannot be easily taken offline or perforated, where the cost and safety risks of maintenance oil drainage or even "bell lifting" (removing the transformer cover) are extremely high. 2. Product Selection: The Dayu Electronics externally mounted ultrasonic level gauge utilizes ultrasonic technology and requires no perforation of the oil conservator, allowing direct "hot work-free" installation, fundamentally eliminating leakage risks and significantly reducing retrofit difficulty and live-line operation risks. It offers minimal measurement error and supports temperature compensation, providing high-accuracy and high-reliability level data. It can also serve as a portable independent verification tool for calibrating false oil levels, or integrate interfaces like 4-20mA and RS485 for remote centralized monitoring and intelligent alarm, making it especially suitable for scenarios in booster stations, substations, and other locations where transformers cannot be easily taken offline or structurally modified. The promotion of this technology is essentially a necessity in the transition from traditional time-based inspection and maintenance to preventive and intelligent operation in power and critical industrial sectors.
2026/6/1
Dayu Electronics: Dedicated Underwater Obstacle Avoidance Solution for Dredging Robot M80
In underwater dredging operations, turbid water and suspended sediment are often the "invisible killers": traditional cameras fail completely due to blocked light, leaving the robot unable to accurately determine its position or avoid obstacles such as tank walls and foreign objects. At best, this slows down operations; at worst, it causes equipment collisions and damage, compromising both dredging efficiency and safety. In such turbid water, light is unreliable, but sound waves work. Ultrasonic obstacle avoidance sensors are specifically designed for this scenario. They do not rely on vision but measure distance by emitting sound waves and receiving echoes. No matter how murky the water or how heavy the sediment, they can still "see" the surrounding environment clearly.
2026/5/12
Dayu Electronic Ultrasonic Flowmeter Application Case in Wuhan Municipal Wastewater Treatment Pipeline
With the acceleration of urbanization, urban sewage discharge has been increasing year by year. Municipal wastewater treatment systems face challenges such as pipeline leakage, low scheduling efficiency, and inaccurate drainage monitoring data. The existing sewage monitoring equipment in the urban area of Wuhan suffers from issues like susceptibility to corrosion and scaling of contact sensors, large measurement errors in partially filled pipes, and high operation and maintenance costs, failing to meet the demands of refined management. Local municipal management authorities urgently need a stable and reliable flow monitoring solution to support precise measurement at wastewater treatment plants, early warning of pipeline blockages, and environmental discharge supervision. 1. Project Background Municipal sewage pipelines generally face difficulties such as partially filled flow, media containing suspended solids and corrosive impurities, humid underground environments, and lack of external power supply. Traditional monitoring equipment is prone to damage, experiences significant data drift, and requires frequent maintenance, making it difficult to meet the requirements for long-term stable operation.
2026/5/6
Dayu Electronics Doppler Flowmeter in Xi'an International Trade and Logistics Park Sewage Pipe Network Monitoring Retrofit Solution
In April 2026, our technical team visited Xi'an International Trade and Logistics Park to provide on-site guidance on abnormal flow monitoring in the sewage pipe network. Through diagnosis and optimization of the original installation scheme, we successfully resolved the issue where the open-channel flowmeter paired with a Parshall flume was submerged in the inspection well and unable to measure accurately, providing replicable field experience for online monitoring of urban sewage pipe networks. 1. Project Background and Original Problem: Ultrasonic Doppler flowmeters are widely used for real-time monitoring of water level, flow velocity, and flow rate in urban rivers, main agricultural irrigation canals, and urban sewage/stormwater pipe networks. They are core equipment for water utility operations and environmental supervision. The monitoring point at Xi'an International Trade and Logistics Park is a DN600 circular sewage discharge pipe with a typical water level of approximately 500 mm. The original installation used an open-channel flowmeter + Parshall flume at the 600 mm diameter inspection well opening. As the water level rose, the Parshall flume channel was completely submerged, preventing the flowmeter from accurately measuring instantaneous and cumulative flow rates, rendering the monitoring data invalid and impacting sewage discharge control and data reporting.
2026/5/6
Dayu Electronics M80 Ultrasonic Depth Sounder Application Case on Unmanned Surface Vessels in Smart Water Conservancy
In smart water conservancy applications, an unmanned surface vessel (USV) is a fully automatic surface robot equipped with satellite positioning and sensing systems that can navigate autonomously. The core advantage lies in its maneuverability and flexibility, overcoming the limitations of traditional water conservancy data collection, which is often "fixed, discrete, and point-based." It enables mobile continuous monitoring of water quality and high-precision three-dimensional mapping of underwater terrain and landforms. As the Ministry of Water Resources accelerates the construction of an integrated "sky-ground-water-engineering" monitoring and sensing system and vigorously promotes digital twin water conservancy construction, USVs work in coordination with drones, satellite remote sensing, and other equipment, and have been deeply applied in key scenarios such as flood control and emergency rescue, water quality monitoring, underwater hazard investigation, reservoir capacity management, and emergency response. They are gradually transforming from traditional auxiliary tools into indispensable key nodes in the smart water conservancy sensing system.
2026/5/6
Dayu Electronics: Urban Flood Inundation Model Empowers Intelligent Water Supply and Drainage Monitoring
With the acceleration of urbanization, higher requirements are placed on urban water safety, water environment, and water ecological governance. Issues such as flood risk caused by extreme rainfall, hidden dangers in sewage pipeline operation, and insufficient precision in reservoir dispatch directly affect urban operational safety and residents' quality of life. Dayu Electronics, deeply engaged in the water supply and drainage monitoring field, leverages the urban flood inundation model to build an integrated intelligent monitoring system covering reservoirs and sewage pipeline networks, providing water supply and drainage management centers with full-process, visualized, and early-warning technical support, facilitating the transformation of urban water governance toward digitalization, intelligence, and refinement.
2026/4/9
Dayu Electronics: Application Practice of Ultrasonic Level Meters in Full-Process Water Treatment at Wastewater Treatment Plants
In the field of municipal wastewater treatment, the accuracy and stability of level monitoring are key to ensuring the efficient and safe operation of the entire process. Facing common industry pain points such as highly corrosive wastewater media and complex, ever-changing operating conditions, traditional measurement methods often fall short. This article takes the successful renovation of a municipal wastewater treatment plant in Sanming, Fujian, as an example to explain how Dayu ultrasonic level meters, with non-contact measurement at their core, provide a reliable and intelligent level monitoring solution.
2026/4/8
Dayu Electronics: Empowering Singapore's Smart Water Utility Upgrade with a Stable, Accurate Water Tank Monitoring Solution
In the wave of urban smart water management and refined building management, reliable water tank level monitoring is a key link in ensuring water supply safety and improving operational efficiency. Dayu Electronics' ultrasonic level sensor, with its outstanding performance, has been successfully deployed in Singapore, providing stable and accurate non-contact level monitoring solutions for domestic water tanks in numerous residential and commercial buildings. It has also been featured in a professional magazine case study in the Asia-Pacific region, becoming a benchmark application in the overseas smart water utility sector. 177511557727841.png 177511557736224.png Traditional water tank level measurement methods, such as float switches or contact probes, suffer from issues like easy water source contamination, frequent maintenance, and incomplete data.
2026/4/3
Dayu Electronics: Solving Level Monitoring Challenges in Enclosed Water Tanks with IP68 Protection and Bluetooth Debugging
In the field of industrial level monitoring, special environments that are humid, enclosed, or even at risk of submersion pose stringent challenges to the reliability of measurement equipment. Recently, Dayu Electronics successfully assisted a customer in solving such a challenge: their enclosed water tank, used for monitoring water level, was covered with a lid, and the equipment faced the risk of complete submersion when the water level rose. In this scenario, traditional level meters often fell short.
2026/4/3
Dayu Electronics: How the Integrated Explosion-Proof Ultrasonic Level Meter Solves Wastewater Treatment Monitoring Challenges
In industrial and municipal wastewater treatment processes, precise monitoring of sewage levels is a core element in ensuring production safety, preventing sewage overflow, and maintaining stable treatment operations. The accuracy of level monitoring data directly affects the rationality of key processes such as pump station scheduling and process adjustments. If monitoring equipment is poorly suited to the application, issues such as measurement deviations and signal disturbances may arise, not only impacting treatment efficiency but also posing safety hazards and environmental risks.
2026/4/3
Field Practice on the Yangtze River in Wuhan: How Professional Installation of Underwater Echo Sounders Ensures Accurate Waterway Data
In the fields of waterway maintenance, hydrographic surveying, and maritime safety assurance, obtaining accurate and reliable water depth data is the foundation of all operations. As the core detection equipment on navigation mark vessels, the performance of an underwater echo sounder depends not only on the precision of the device itself but also on professional installation. Recently, Dayu Electronics successfully provided installation guidance for underwater echo sounders on navigation mark vessels in the Wuhan section of the Yangtze River, Hubei Province. This case profoundly demonstrates the decisive role of professional installation in ensuring data accuracy and long-term equipment performance.
2026/4/3
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