When this pulse energy comes in contact with a mass of product on the probe, the signal is returned and analyzed to see if it is the true liquid level. Since the liquid level always has a larger signal return than the smaller mass that is sticking on the probe, the liquid surface is easily identifiable.
The advanced algorithms developed over the last decade have made this contacting form of level measurement the ideal solution for even the stickiest of fluid applications. Advantages of GWR in the level industry are endless. Unlike older technologies, GWR offers measurement readings that are independent of chemical or physical properties found in the contact media. Additionally, GWR performs equally well in liquids and solids.
Recommended Articles. More Articles. Level Measurement. Send this to a friend. Send Cancel. There is a tendency to pit ultrasonic level sensors and radar level sensors against one another when in reality each sensor has advantages and disadvantages that give each sensor its own place. In this blog, we will look at the differences in how these two technologies work and will cover the applications each sensor is best suited for. As the name implies, ultrasonic level sensors operate by emitting a burst of sound waves in very rapid succession.
The sound waves emitted from the sensor travel at a known speed the speed of sound to the intended target where they bounce off the target and return to the sensor. Using the amount of time it takes for the sound burst to return to the sensor after being sent, the distance between the sensor and the substance being measured or the level of the substance is calculated. With help from other parameters programmed into the sensor or control system, volume, weight, or other similar measurements can also be calculated from the measured distance.
In order to accurately determine the level of the target substance, ultrasonic sensors require an unobstructed air column between the sensor and the target. Things like physical obstructions, excessive foam, heavy vapors, thick dust, and light powders can all deflect or absorb the signal, or act as a false surface leading to erroneous readings from the ultrasonic sensor.
Ultrasonic sensors are most commonly used for measuring the level in a body of liquid, such as in a tank, well, pit, lake, or another body of liquid. Ultrasonic level sensors can also be used to measure liquid in non-linear containers. This usually requires a strapping chart to adjust the reading to a volume as liquid rises and falls.
Ultrasonic sensors are an excellent choice for solids level measurement, especially in comparison with radar level sensors. It is important to note that using an ultrasonic sensor for solids level measurement usually reduces the effective range of the sensor by half.
Additionally, environments with dusts or powders scatter sound waves, leading to erroneous readings. But an ultrasonic sensor with an appropriate range used in an environment with little to no air-borne particles will provide extremely reliable solids level measurement.
Open channel flow is another application of an ultrasonic level sensor. Open channels are a primary means of transporting, filtering, and metering water, often used in water treatment plants, environmental monitoring, and irrigation canals. Often, in this type of application, ultrasonic level sensors are paired with an appropriate controller for flow calculations. Last but not least, ultrasonic sensors are a great fit for presence detection and object profiling.
If object detection is required in dirty or wet environments where the targets are fairly slow-moving, an ultrasonic sensor can be used.
To know more about level transmitters, please ask our engineers! Ultrasonic level transmitter vs radar level transmitter difference and applications. Visaya Feb 15, Ultrasonic level transmitter vs radar level transmitter Ultrasonic level transmitter In my opinion, ultrasonic level transmitters are becoming obsolete. EcoMeter P Ultrasonic level sensor with integrated radio module and external power supply. Buy online now. Searching for automation devices? Find the right device for your application.
Visit eShop. Recommended articles How does an ultrasonic level sensor work and when to use it? Guided wave radar: working principle, benefits and applications Featured Level. Micropilot FMR10 Free space radar level sensor for water, wastewater in all industries.
0コメント