Page 2 of catalogue Ultrasonic sensors of Vega Grieshaber KG

Level measurement – Ultrasonic

VEGASON
Contactless measurement with ultrasonics
Measuring principle
Short ultrasonic impulses in the range of 10 to 70 kHz are emitted by the transducer to the measured product, reflected by the product surface and received again by the transducer. They spread with sound velocity. The time from emission to reception of the signals is proportional to the level in the vessel. The proven ECHOFOX signal processing filters out the correct level echo from a number of false reflections. An adjustment with empty and full vessel is not necessary.

Applications in liquids

Sensors with frequencies between 30 and 70 kHz are used for these applications. They operate independent of product properties and are ideal for water/waste water applications and the measurement of slightly corrosive acids and lyes. Also applications in gas-Ex areas can be equipped with these sensors.

Applications in bulk solids

Sensors with frequencies between 10 to 30 kHz are used for these applications. The lower switching frequency enables a considerably better penetration of dusty atmosphere. An adjustment with medium is not necessary. For applications in dust-Ex areas, approved sensors are available.

56 - AL-EN

Level measurement – Ultrasonic