Uson-21 Ex Ultrasonic Level Transmitter for Hazardous Areas
Uson-21 Ex ultrasonic level transmitter is designed for continuous liquid level measurement in applications that require explosion-proof protection and reliable field performance. It is suitable for both general industrial conditions and hazardous areas that contain explosive gas. Because it uses non-contact ultrasonic measurement, it helps reduce wear and maintenance during long-term operation.
The device is built with a flameproof enclosure and is certified for Ex d IIC T6 Gb explosion protection. This makes it a practical choice for industrial users who need safe and stable liquid level measurement in hazardous environments.
Non-Contact Ultrasonic Measurement with Stable Signal Output
The transmitter sends high-frequency ultrasonic pulses toward the liquid surface. When the signal reaches the surface, it reflects back to the transducer. The system then calculates the distance from the travel time of the ultrasonic wave. This method provides reliable non-contact measurement and helps avoid problems caused by direct contact with the liquid.
Uson-21 Ex ultrasonic level transmitter offers three selectable measuring ranges: 5 m, 10 m, and 15 m. It also includes temperature compensation, which helps improve measurement accuracy under changing ambient conditions. In addition, a special echo-processing algorithm helps reduce false echoes and improve signal stability in practical field applications.
Practical Communication and Durable Industrial Design
The device supports RS-485 communication, which makes real-time monitoring and system integration easier. It also supports convenient multilingual operation in different installation environments. For corrosive applications, the transducer can use PVDF material to improve durability and chemical resistance.
The product supports IP66/IP67 protection, which helps it perform reliably in wet, dusty, and outdoor industrial conditions. Its EMC design also complies with IEC61000-4 and GB/T 17626.2 requirements for EFT, ESD, and surge performance. These features help maintain stable operation in demanding field environments.
Typical Applications
This ultrasonic level transmitter is widely used in open tanks and pools that contain explosive gas, as well as in corrosive and hazardous environments such as urban drainage pumping stations, sump pits, collecting wells, biochemical reaction pools, and sedimentation tanks. It is also suitable for industrial liquid level monitoring where users need non-contact measurement with explosion-proof protection.
For other level solutions, see the [Uson-31 Ultrasonic Level Transducer] and the [Uson-11 Ultrasonic Level Transmitter]. The device also supports [RS-485 communication] for easier integration into monitoring and control systems.
