Ultrasonic level meter working principle and selection

What are the characteristics of an ultrasonic level gauge? Jinhu Jiete Instrument introduces you to the working principle of the ultrasonic level meter. When selecting an ultrasonic level gauge, it's essential to understand its features and capabilities, which will help you choose the right type for your application. Let’s explore the working principle of the ultrasonic level meter and the key characteristics that make it a reliable choice for various measurement scenarios. Ultrasonic level meters work by emitting high-frequency sound waves from a transducer (probe). These sound waves travel through the air or medium and reflect off the surface of the material being measured. The reflected signal is then captured by the same transducer and converted into an electrical signal. By measuring the time it takes for the sound wave to travel to the surface and return, the system calculates the distance using the formula: S = C × T / 2, where S is the distance, C is the speed of sound, and T is the time taken. However, there is a small area near the transducer where the sound wave cannot be accurately received due to mechanical inertia during emission. This area is known as the "blind zone." The size of this blind zone depends on the range and design of the ultrasonic sensor. An ultrasonic transducer, also called a probe, is responsible for converting electrical energy into ultrasonic waves and vice versa. In ultrasonic level gauges, the term "level" refers to the position of a liquid or solid surface within a container, whether open or closed. Ultrasonic waves are defined as sound waves with frequencies above 20 kHz. These waves are mechanical in nature, propagate through elastic media, and have high frequency, short wavelength, and minimal diffraction, making them highly directional. They can penetrate liquids and solids with little attenuation, especially in opaque materials, allowing them to travel several tens of meters before encountering an obstacle. This makes them ideal for level measurement applications. Understanding the features of an ultrasonic level gauge helps users make informed decisions. Here are some key advantages: 1. **High-performance probes**: Professional ultrasonic small-angle probes offer strong transmission power, high sensitivity, long lifespan, and extended measuring range. 2. **Flexible configuration**: Users can set upper and lower limits, reverse settings, and define specific distances within the measurement range for 4-20mA or 0-5V output signals. This allows easy installation and debugging to meet different signal requirements. 3. **Multiple output options**: Available outputs include 4-20mA, 0-5V, 0-10V, and digital signals via RS232 or RS485 (optional). A smart digital display provides multiple functions, including alarm and self-control for liquid level monitoring. 4. **User-friendly interface**: LED digital displays show real-time distance or depth data, making on-site measurements convenient. Some models also feature temperature display. 5. **Durable and sealed design**: The fully sealed structure allows for field use and direct measurement of liquids without interference. 6. **Cost-effective**: Offers excellent performance at a competitive price. In summary, ultrasonic level gauges are versatile, accurate, and reliable instruments suitable for both liquid and solid level monitoring. Whether used in industrial, commercial, or residential settings, they provide efficient and precise measurement solutions. Source: electromagnetic flowmeter | orifice flowmeter Http://news.chinawj.com.cn Submission:

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