Although the ultrasonic level meter has many advantages, it will be affected by the environment when measuring, but as long as we master the method, we can minimize the impact.
Next, I will briefly introduce what points should be noted: first, the influence of dust. Although the effect of dust on sound velocity is very small, ultrasonic attenuation will still be obvious. In practice, we can use a low frequency probe with a special foam surface to reduce the impact of dust. It
Second, the influence of temperature. The change of temperature will affect the change of sound speed. In actual measurement, many natural factors will lead to temperature difference.
The ultrasonic level meter can compensate the influence of temperature automatically. In practical application, the temperature of ultrasonic medium and the measured medium are different because of the environment around the probe. The measuring system should select the external temperature sensor which is separated from the built-in temperature sensor and the probe according to the actual requirements. A more accurate measurement system can place the echo reflection reference at a specific location from the probe to produce a reference echo to compensate for the temperature effect. The validity of this method depends on the accuracy of the placement of echo reference objects.