Dayu Electronics: Advantages of Externally Mounted Ultrasonic Level Switches in Pipeline Media Detection

In industrial fields such as petroleum, chemical, electric power, and pharmaceuticals, the presence or absence of media inside pipelines directly affects the continuity of process flows and the safety of production equipment. How to accurately detect whether there is water or other media inside a pipeline without stopping production, drilling holes, or using open flames is a common challenge faced by many users. Traditional contact-based detection methods often require drilling holes in the pipeline or coming into contact with the internal media, which not only leads to longer installation cycles but also poses leakage risks and safety hazards. This challenge is especially prominent in explosive gas environments.

The explosion-proof externally mounted ultrasonic level switch from Dayu Electronics is a professional solution designed to address this need. This product uses the ultrasonic through-transmission measurement principle: one sensor emits high-frequency ultrasonic signals, while the other sensor is responsible for receiving them. The ultrasonic signals penetrate the carbon steel pipe wall and propagate through the internal media—when there is water in the pipe, the ultrasonic signal travels smoothly through the water medium, and the receiving end picks up a strong transmitted signal; when the pipe is empty, the acoustic signal is attenuated by the gas inside the pipe, causing the receiving end signal to drop significantly or disappear altogether. By analyzing the strength of the received signal in real time, the sensor can accurately determine whether media is present inside the pipe.

In practical applications, users need to detect the presence of water inside DN100 and DN150 carbon steel pipes, requiring the product to be explosion-proof and to have explosion-proof certification. Carbon steel pipe material is dense and has good acoustic conductivity, allowing ultrasonic signals to effectively penetrate the pipe wall and establish a stable propagation path within the internal media. The explosion-proof externally mounted ultrasonic level switch complies with the national standards GB3836.1-2010 and GB3836.2-2010, with an explosion-proof marking of Ex d II C T6 Gb. It is suitable for explosive gas environments other than coal mines, fundamentally eliminating the safety risks associated with using electrical equipment in hazardous locations. Once the presence of water is detected, the explosion-proof externally mounted ultrasonic level switch can output a relay switch alarm signal to activate on-site audible and visual alarms or transmit to control systems such as PLC and DCS, enabling remote monitoring and automated interlocking control. The entire detection process does not contact the internal media, does not alter the original equipment structure, does not require pipeline drilling or production shutdown, and significantly reduces installation complexity and maintenance risks.

This product features a cast aluminum explosion-proof housing and a stainless steel sensor casing, with a protection rating of IP65, making it suitable for a wide range of harsh operating conditions. During installation, the sensor can be quickly deployed by simply bonding or clamping it onto the target position on the outer wall of the pipeline and applying acoustic coupling gel to ensure good sound transmission and avoid signal loss. The sensor should be installed as far as possible from structural discontinuities such as pipe welds to ensure stable and consistent ultrasonic signal propagation through the pipe wall.

Non-contact sensing is gradually replacing traditional contact-based detection and has become an important development direction in industrial process monitoring. Dayu Electronics will continue to provide users with safe, efficient, and reliable pipeline media detection solutions based on solid sensing technology and consistent product quality.