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 important to understand its features and how they apply to different measurement scenarios. This knowledge can help you choose the most suitable type for your application. The ultrasonic level meter works by emitting high-frequency sound waves from a transducer (probe). These sound waves travel through the air or medium until they hit the surface of the material being measured. The reflected echo is then captured by the same transducer and converted into an electrical signal. The time it takes for the sound wave to travel to the surface and return is used to calculate 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, the system determines the level accurately. However, there is a "blind zone" near the transducer where the sound wave cannot be received immediately after emission due to mechanical inertia. This area must be considered when determining the effective measuring range of the device. In ultrasonic detection technology, the transducer plays a key role by converting electrical energy into ultrasonic waves and vice versa. Ultrasonic level gauges are commonly used for measuring both liquid and solid levels. They are referred to as ultrasonic level meters when used for liquids and as ultrasonic level gauges when used for solids. Ultrasonic waves are mechanical vibrations with frequencies above 20 kHz. They have good directionality, minimal diffraction, and strong penetration in liquids and solids. They are ideal for non-contact level measurement, especially in opaque containers or environments where traditional methods may not work well. Understanding the characteristics of an ultrasonic level gauge makes it easy to use: 1. Choose a professional small-angle probe that offers high transmission power, sensitivity, long life, and extended measuring range. 2. Set upper and lower limits, reverse settings, and define two points within the measuring range to correspond with 4-20mA or 0-5V signals. The sensor is easy to install and adjust, meeting various signal connection needs. 3. Output options include 4-20mA, 0-5V, and 0-10V. Digital signals such as RS232 or RS485 (optional) are available. An intelligent digital display provides multiple functions, including level control and alarms. 4. The LED display shows real-time distance or depth data, making on-site measurements convenient. It also includes temperature display functionality. 5. A fully sealed design allows it to operate in harsh field conditions and directly measure liquids. 6. It’s cost-effective and offers excellent value for money. For more information, visit: electromagnetic flowmeter http:// orifice flowmeter http:// Source: http://news.chinawj.com.cn

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