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Level Switchs
Rotary Paddle Level Switch
Reliable point level detection for powders and bulk solids in silos, bins, and hoppers
Instrava rotary paddle level switch is designed for stable and reliable point level detection in powder and bulk solid applications where dust, material density variation, and continuous operation are common challenges.
By combining adjustable torque detection, industrial-grade motor protection, and robust sealing design, this solution minimizes false alarms, reduces maintenance frequency, and protects equipment during material blockage or overload conditions. It is widely used in silos, hoppers, bins, and bulk material handling systems across multiple industries.
Key reasons engineers and procurement teams choose this solution:
Stable and adjustable torque to match different material densities
Built-in overload protection to prevent motor damage
Reliable operation in dusty and harsh industrial environments
Large output contact capacity for direct control system integration
Designed for long-term, low-maintenance industrial operation
OEM / ODM configuration available for equipment manufacturers
A proven level control solution focused on lifecycle reliability rather than short-term cost.
Liquid Level Switch Description
Rotary Paddle Level Switch Key Technology & Performance
Engineering & Technical Selection
Measurement Principle
The rotary paddle level switch detects material presence by monitoring paddle rotation. When bulk material blocks the rotating blade, torque increases and triggers a switching signal.
Torque Stability & Sensitivity
Stable and adjustable torque ensures consistent switching
Sensitivity can be fine-tuned via spring tension to match material density
Special paddle designs support low-density bulk materials
Motor Protection & Reliability
Built-in overload protection prevents motor damage
Low rotating speed (1 rpm) minimizes wear and extends service life
Output & Integration
Dual DPDT output supports flexible control logic
Suitable for direct integration with PLCs and industrial control panels
Rotary Paddle Level Switch Applications & Industry Solutions
Cement, Minerals & Building Materials
Used in silos and bins for level detection of cement, lime, sand, and aggregates to prevent overfill and material shortage.
Grain, Feed & Agricultural Storage
Reliable level monitoring for grain bins and feed silos where dust and variable bulk density are common.
Chemical & Plastic Processing
Applied for powders and pellets in reactors, storage hoppers, and conveying systems.
Power, Energy & Environmental Systems
Used in ash handling, dust collection, and bulk material storage applications.
OEM Equipment Integration
Widely integrated into packaged silos, conveyors, and bulk handling equipment as a standard level switch.
Liquid Level Switch Parameter
Rotary Paddle Level Switch Technical Specifications
| Parameter | Specification |
|---|---|
| Applicable Media | Powder, Particle |
| Particle Diameter | ≤ 20 mm |
| Rod Length | Standard: 150–500 mm; Extended: 500–2500 mm |
| Material | SS304, SS316L |
| Working Temperature | –10 to 80 °C (max up to 400 °C) |
| Rotating Speed | 1 r/min |
| Signal Output | 2 × DPDT |
| Contact Capacity | 250 VAC / 10 A, 1 × SPST |
| Process Connection | Thread, Flange |
| Power Supply | 220 VAC, 110 VAC, 24 VDC |
| Protection Grade | IP65 |
Instrava OEM/ODM
Instrava Engineering & Customization Support
At Instrava, our instruments are developed with a strong focus on real industrial applications. Each product is designed to operate as a reliable component within measurement, control, and automation systems, rather than as a standalone device.
Our engineering team supports customers during product selection by evaluating process conditions, operating environments, and system requirements, ensuring stable and long-term performance in actual use.
In addition to standard configurations, Instrava offers flexible customization options, including measurement range, materials, output signals, communication interfaces, and installation methods. All custom solutions are engineered to meet industrial standards and application-specific demands.
We also support OEM projects and system integration, providing consistent product design, technical documentation, and long-term supply to ensure smooth integration and reliable operation throughout the project lifecycle.
Related Product Recommendations
Rotary paddle level switches are commonly used for point level detection of powders and bulk solids in silos, bins, hoppers, and bulk material handling systems.
The switch detects material presence by monitoring the rotation of a paddle. When bulk material blocks the blade, torque increases and triggers a switching signal.
Yes. The torque sensitivity can be adjusted to match different bulk material densities, allowing stable operation across a wide range of powders and particles.
Yes. The switch features good sealing performance and is designed for reliable operation in dusty and harsh industrial conditions.
The rotary paddle level switch includes built-in overload protection to prevent motor damage when material blockage or abnormal load occurs.
Yes. Instrava provides engineering support, customization options, and OEM/ODM services for integration into bulk material handling equipment.
Why Choose Instrava
By choosing Instrava, you gain a partner with a deep understanding of industrial applications and the expertise to meet today’s operational challenges.
Our role extends beyond products—we support your success through dependable solutions and long-term commitment.
Engineering-Driven Innovation
Innovation at Instrava is guided by real industrial requirements. We continuously refine our technologies to address evolving operational challenges, ensuring practical and reliable performance in demanding environments.
Application-Specific Customization
We provide engineering-level customization to match specific process conditions. From measurement range and materials to output signals and installation options, our solutions are configured to fit real applications.
Proven Quality and Reliability
Quality and reliability are fundamental to every Instrava product. Manufactured under strict quality control and thoroughly tested, our instruments deliver accurate, stable, and long-term performance.
Global Capability with Local Support
Instrava combines global engineering expertise with responsive local support, ensuring our partners benefit from internationally aligned technology and timely regional service.
Comprehensive Product Portfolio
Our broad portfolio of measurement and control instruments enables us to address a wide range of industrial needs, providing integrated solutions from a single, reliable source.
Partner-Oriented Engineering Support
We work closely with our partners from technical consultation to after-sales support. Our focus is on delivering solutions that create lasting value and support long-term operational success.
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