Ultrasonic Level Measurement

LEVEL

The transmitter emits an ultrasonic wave at a surface, which then reflects the signal. By using the signal delay time, the device can calculate the distance from the sensor lower edge to the surface. The influence of the speed of sound, which itself is dependent on the surrounding atmosphere, is automatically compensated for by the transmitter based on the input of specific values and measurement of the ambient temperature. If the distance between the sensor lower edge and the bottom of a container is known, the device can display the fill level. If the container geometry is known, then the volume can also be determined. With the help of various disturbance echo filters, the system can also be used inside containers – even if built-in fixtures generate disturbing echoes. Since there is no direct contact with the medium, the sensor enables applications with strict hygiene requirements. They are usually used in open basins, wastewater applications, and silo or tanks of chemical and dairy plants.