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 Switches 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 Switches 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
Tailored Sourcing & Customization: Getting You the Exact Product You Need
As your trusted supplier and sourcing partner, we bridge the gap between your custom requirements and China’s vast manufacturing capabilities.
Finding the right product in a massive supply chain can be challenging. That is where we step in.
As a curated industrial supplier, our core value is simple: we stand in your shoes to help you procure the most optimal products. Whether you are an EPC contractor needing specialized technical compliance, an OEM equipment manufacturer looking for custom branding, or an industrial distributor/trader seeking competitive edge, we customize and tailor products to fit your exact procurement needs.
How We Customize to Fit Your Procurement Needs
For EPC Contractors & Engineers: We custom-configure instruments and devices to match your precise datasheets—tailoring process connections, exotic materials, signal protocols, and managing third-party calibration and testing so you get project-ready solutions.
For OEM Equipment Manufacturers: We provide comprehensive OEM/ODM customization, including custom housing, labeling, branding (private labeling), and tailored technical specifications to seamlessly integrate with your machinery.
For Industrial Distributors & Traders: We offer flexible customization in packaging, product ranges, and technical parameters, helping you differentiate your portfolio and win more local bids.
Why Partner with Us for Custom Sourcing?
One-Stop Engineering Alignment: You don’t have to deal with multiple factories. We translate your technical requirements into precise manufacturer blueprints.
Strict Quality & Compliance Safeguard: We oversee the entire customization and production process in China, ensuring the final customized product meets your local standards and certifications.
Our Ultimate Value: We don’t just sell what’s on the shelf. We find, customize, and deliver the most suitable and cost-effective product for your unique application.
What applications are rotary paddle level switches used for?
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.
How does a rotary paddle level switch work?
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.
Can a rotary paddle level switch handle different material densities?
Yes. The torque sensitivity can be adjusted to match different bulk material densities, allowing stable operation across a wide range of powders and particles.
Is this rotary paddle level switch suitable for dusty industrial environments?
Yes. The switch features good sealing performance and is designed for reliable operation in dusty and harsh industrial conditions.
What protection features are included to prevent motor damage?
The rotary paddle level switch includes built-in overload protection to prevent motor damage when material blockage or abnormal load occurs.
Is this rotary paddle level switch suitable for OEM and equipment integration?
Yes. Instrava provides engineering support, customization options, and OEM/ODM services for integration into bulk material handling equipment.
Why Trust Instrava?
We select manufacturers from a neutral, impartial standpoint, always with your best interests in mind.
Our very existence depends on helping you source the products that are the perfect fit for your needs.
Based in China, we are able to conduct on-site inspections of production environments and product quality firsthand.
We help you avoid intermediaries posing as factories.
We facilitate smoother after-sales support, eliminating time zone issues and the delays often associated with dealing directly with factories.
Our multilingual team ensures effective communication.
For a trading startup, every interaction with a client is a precious opportunity—a sign that you are willing to place your trust in us and give us the chance to prove ourselves.
In the digital age, while information is easily accessible, misconceptions often cloud the trust between people.
Instrava relies entirely on trust; it is our core philosophy and the foundation of our existence in society. It is the fundamental basis for our long-term growth and our commitment to serving the community.
Please place your trust in us.
