Product Description
The ISEN-30AAF-700 is an electromechanical rotary paddle level sensor designed to detect high-level and low-level conditions in silos, hoppers, and bulk material storage tanks. The sensor operates using a rotating paddle mechanism. When bulk material reaches the paddle and prevents it from rotating, the internal switching mechanism changes the SPDT contact status, sending a level signal to the control system.
Featuring a vertical flanged mounting design, an adjustable shaft length from 450 to 700 mm, 220 VAC power supply, and SPDT output contacts, the ISEN-30AAF-700 is ideal for level detection of powders, granules, cement, animal feed, plastic pellets, and many other bulk solids.
Key Features
Adjustable Shaft Length
The shaft length can be adjusted from 450 mm to 700 mm, providing installation flexibility for silos and hoppers with varying depths.
Heavy-Duty Flanged Connection
The JIS 2-1/2″ × 5 kg/cm² flanged connection provides secure mounting on the side or top of silos, ensuring reliable performance in industrial environments.
SS304 Stainless Steel Paddle
The paddle is manufactured from SS304 stainless steel, offering excellent corrosion resistance and long service life under continuous operation.
SPDT Output Contact
The SPDT output can be easily integrated with PLCs, control panels, alarm systems, and industrial automation equipment.
IP65 Protection
The enclosure is rated IP65, providing effective protection against dust ingress and water splashes for reliable operation in harsh industrial environments.
Technical Specifications
| Specification | Value |
|---|---|
| Model | ISEN-30AAF-700 |
| Device Type | Rotary Paddle Level Sensor |
| Mounting Type | Vertical Flanged Mounting |
| Connection | JIS 2-1/2″ × 5 kg/cm² Flange |
| Power Supply | 220 VAC, 50 Hz |
| Output Contact | SPDT, 220 VAC / 10 A |
| Paddle Material | SS304 Stainless Steel |
| Paddle Size | 100 × 30 mm (W × H) |
| Shaft Length | Adjustable, 450–700 mm |
| Protection Rating | IP65 |
| Maximum Working Temperature | 80°C |
| Minimum Bulk Density | ≥ 0.5 g/cm³ |
Operating Principle
When no material is present, the internal motor rotates the paddle at a low speed.
When the bulk material reaches the paddle:
- The rotating paddle is obstructed by the material.
- The internal mechanism actuates a microswitch.
- The SPDT contact changes state.
- A level signal is transmitted to the PLC or control panel.
When the material level drops below the paddle, the paddle resumes rotation and the contact automatically returns to its normal state.
Applications
The ISEN-30AAF-700 Rotary Paddle Level Sensor is widely used in:
- Cement silos
- Fly ash silos
- Animal feed plants
- Plastic manufacturing
- Food processing plants
- Limestone powder handling systems
- MDF board manufacturing
- Powder chemical processing
- Bulk material storage tanks and hoppers
Advantages
- Simple and robust construction.
- Reliable operation in dusty environments.
- Unaffected by material color.
- Unaffected by the electrical conductivity of the material.
- Easy installation and maintenance.
- Cost-effective level detection solution.
- Suitable for a wide variety of granular and powdered bulk materials.








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