Product Information

Level Measurement

Rotation Switch for a Wide Range of Industries

Each rotation switch unit from Hawk uses a rotating vane as a sensor to detect the level of powdered material. The vane is turned slowly by a brushless synchronous motor. A switch turns off the synchronous motor and produces an output for an external control system. The vane sensing system means the rotation switch can be used for powdered materials with low densities (greater than 0.1 g/cm3 or 6 lb/ft3).

About 80% of all industrial dust materials, including sawdust, grain dust, cellulose, baking flour, laundry detergent, vitamin C, and finely-ground metals, are potentially explosive, and can be ignited by sparks, high temperatures, static electricity, or electro-magnetic waves. Hawk’s rotation switches have ATEX and FM approvals for operation in these potentially dangerous environments.

The vane’s drive system includes a friction clutch to protect the drive gear against any mechanical blows to the vane. The vane shaft is supported by a high-grade slide bearing with a Teflon™ coating. The aluminum-coated enclosure is designed to stand up in tough applications (IP66/NEMA4 rating).