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This sensor is suitable for level detection of granules, dust, and other free-flowing solids.
Mounted on silos or tanks, the DF11 operates effectively for level control, filling/emptying operations, and provides protection against overfilling.
These applications are found in the following industries:
• Food: Sunflower seeds, ground coffee, cocoa powder, flour, sugar, etc.
• Chemical: Plastic powder, granules
• Building: Sand, Cement, Plaster
• Energetic: Active carbon, Charcoal powder, Fly ash
An electric motor drives a paddle that rotates freely when no material is present.
When the paddle is slowed down by the presence of material, it causes the motor to rotate slightly, compressing a return spring and triggering two contacts. "One of the electrical contacts is used for control and alarm functions, while the other disconnects the motor power supply.
When the product level drops, the return spring restores the motor to its original position, reactivating the unit.
Material:
| Housing | Aluminum RAL 7000 | |
| Shaft | stainless steel | |
| Paddle | Plastic (Option: Stainless steel) | |
| Ambient temperature | -20...+70 °C | |
| Operating temperature | -25...+80 °C | |
| Pressure | -0,5...1 bar | |
| Power supply | 220 ... 240 V, 110 ... 120 V, 48 V, 24 V AC and 24 V DC | |
| Contact output | Potential-free, 1 mA / 4 V DC … 2 A / 250 V AC | |
| Rotations | 1 /minute | |
| Response time | Approx. 1.20 sec | |
| Consumption | 4 VA – 4 W | |
| Electrical protection | Class I | |
| IP rating | IP 66 according to DIN EN 60529 | |
| ATEX options | ATEX II 1/2D Ex ta/tb IIIC T80°C ATEX II 1/3D Ex ta/tc IIIB T80°C |
CE compliance: The device complies with the legal requirements of the applicable European Directives.
