Rotating vane rotation is maintained when uncovered and stops when covered with solid products. This actuates a relay that indicates the presence of product.
PRODUCTS

Soliswitch FTE20
Economical mechanical device level detector for granulated solids.

Soliswitch FTE30
Robust mechanical device level detector for granulated solids.

Soliswitch FTE31
Level detector for granulated solids with mechanical device, approved for use in EEx zone.