Ultrasonic liquid level gauge measurement principle and installation

When the ultrasonic liquid level gauge is working, the high-frequency pulse sound wave is emitted by the transducer (probe), and is reflected on the surface of the measured object (water surface), and the reflected echo is received by the same transducer (probe) and converted into an electrical signal . The time between pulse sending and receiving (sound wave movement time) is proportional to the distance from the transducer to the surface of the object, and the relationship between the distance S of sound wave transmission and the speed of sound C and transmission time T can be expressed by the formula: S=CXT /2 Install the ultrasonic liquid level meter to consider the blind area of ​​the ultrasonic liquid level meter. When the liquid level enters the blind zone, the ultrasonic transmitter cannot measure the liquid level, so when determining the range of the ultrasonic liquid level gauge, leave a margin of 50 cm. When installing, the transmitter probe is higher than the highest liquid level. About 50 centimeters. In this way, the accurate monitoring of the liquid level and the safety of the ultrasonic liquid level gauge can be guaranteed. In actual use, due to poor consideration during installation, the liquid level gauge is submerged in water, resulting in complete damage to the liquid level gauge. The characteristics of ultrasonic liquid level gauge are low price, small size and light weight. It can be used in food, chemical, semiconductor and other industries for non-contact level measurement of liquids and bulk solids. It can be used for remote level monitoring and pump control. Note: The installation should be perpendicular to the surface of the object to be measured, avoid being used to measure objects with foam properties, and avoid installing where the distance from the surface of the object to be measured is less than the distance from the blind area (blind area: each product will have a standard, which can be learned with the product), and the beam should be considered Avoid blocking substances and do not meet the filling mouth and container wall. When detecting large solid objects, the probe position should be adjusted to reduce measurement errors.