Level measurement in Dry Blend

The Challenge

A manufacturer of window frames has applications for level sensors in high silos to measure dry blend PVC powder. The challenge at this product is the low DK-value of about 1,5 and the high dusty atmosphere and tall, narrow size of the silos. The diameter is between 2,5 m and 3 m. The heigth can be more than 20 m.

Our Solution

The solution for the full detection is the dust sealed paddle switch Rotonivo 3002. In this version it has a sensitivity of 100 g/l. That is high enough for the Dry Blend powder with a density of about 600 g/l. The RN 3002 works irrespective of the Dk-value and is protected against the very dusty environment by a shaft-sealing. The content level measurement is performed by a NivoBob 3200. This electromechanic tape system has a tape cleaner implemented. This feature keeps the mechanical parts clean in the housing and affects a long life of the sensor. Also the NB 3200 works irrespective of the DK-value.