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Blind Spot of Non-contact Ultrasonic Level Sensing
Regarding the dead zone that occurs in the use of the non-contact ultrasonic level sensing.
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Regarding the dead zone that occurs in the use of the non contact ultrasonic level sensing, depending on the measurement distance, the size of the blind spot is also different. The measurement distance is small, and the blind zone is small; when the measurement distance is large, the blind zone is large. The general blind zone ranges from 30 to 50 cm. Therefore, the ultrasonic level sensor blind zone must be considered during installation. In special industrial scenarios, it is necessary to ensure a small blind zone. In this case, it is possible to consider a product with a small blind zone, such as an ultrasonic level sensor with a dead zone of 4-6 cm and a measuring distance of 0.6. Please remember that the blind zone is small, the measurement distance is small, and it can be selected according to the actual industrial measurement requirements. It also needs to consider the measurement field, the installation space, and the external environment in use.

When the ultrasonic level sensing transmits the ultrasonic pulse, it can not receive the reflected echo at the same time. It takes a certain time after the pulse is emitted, and the sensor has the characteristics of residual vibration. During this period, the reflected echo cannot be detected, so the short distance from the bottom of the probe surface cannot be detected normally. This distance is called a blind spot. If the highest object is measured to enter the dead zone, the instrument will not detect it correctly and an error will occur. Increase the distance of the ultrasonic level sensor if necessary. This is also the best solution for solving the blind spot of the non-contact ultrasonic liquid level sensor.