Rotary Paddle Level Switch

Our rotary paddle level switch adopts high-quality aluminum alloy and stainless steel for all wetted and exposed components, delivering excellent corrosion resistance, moisture-proof performance and non-contamination property for long-term industrial use. Equipped with multiple protective structures and humanized mechanical design, this level detector features outstanding durability, stable operation, easy installation and low maintenance cost. It supports flexible configuration for various bulk materials and on-site conditions, making it a reliable solution for point level monitoring in silos, tanks and hoppers.

• Premium Material Construction

Wetted and exposed parts are made of stainless steel and aluminum alloy. The whole unit is corrosion-resistant, moisture-proof and non-contaminating, adapting to various harsh industrial environments.

• Full Enclosure & Dust Prevention

Fully enclosed housing enables outdoor installation. The specialized oil seal structure effectively blocks dust from penetrating along the drive shaft, ensuring stable long-term operation in dusty workshops.

• Built-in Overload Slip Protection

An integrated overload protection mechanism is fitted on the output shaft. When the paddle bears excessive load or abnormal external force, the rotary mechanism will slip automatically to prevent permanent damage to the motor and gear reducer.

• Adjustable & Stable Torque

It maintains consistent detecting torque during operation. The torque value is fully adjustable to match materials with different weights and densities.

• Split Motor Structure for Easy Maintenance

Unique motor separation design realizes overall non-disassembly maintenance. No need to take apart the whole device for routine inspection and troubleshooting.

• Lightweight & Flexible Installation

Compact and lightweight body for effortless mounting. Routine check and repair can be completed without removing the entire unit from tanks or chutes, greatly cutting downtime. Multiple installation methods are available to meet different site requirements.

• Dedicated Low-Torque Series

Model XYPRS80/81/82 are specially designed with low torque, ideal for detecting low specific gravity materials inside small tanks and silos.

Working Principle & Operational Diagram

(Working operation diagram placement here: display equipment rotating state, material triggering process and structural operation principle)

This rotary paddle level switch adopts a miniature low-power motor and precision clutch structure for accurate solid level detection. The paddle rotates freely at a constant speed when no material exists. Once blocked by bulk materials, the motor stops immediately, and the internal circuit outputs a switch signal to trigger level alarm or feeding stop control. Featuring good sealing, large contact capacity and overload protection, it adapts to long-term operation in various dusty industrial environments.

Control Circuit Switching Logic

The internal circuit switches signals synchronously with motor operation status, compatible with mainstream industrial PLC and automatic control systems:

• No Material (Normal Rotation): The paddle runs freely, keeping the COM-NC closed for system standby monitoring.
• Material Blocked (Alarm Status): Material resistance stops the paddle rotation. COM-NC disconnects and COM-NO closes to output control and alarm signals.
• Automatic Reset: When the material level drops and resistance disappears, the motor resumes rotation, and the circuit automatically resets to the initial monitoring state.

Industry Application Scenarios

The rotary paddle level switch is dedicated to point-level detection of powder, granular and gel bulk solids. Benefiting from IP65 dustproof structure, adjustable torque and strong overload resistance, it is widely used for high/low level alarm and automatic feeding control in industrial silos, hoppers and storage tanks across various industries.

• Food & Beverage Industry

Suitable for level monitoring of flour, grain, sugar, starch and other food raw materials. Its non-pollution, corrosion-resistant structure meets food hygiene standards, supporting automatic inventory management and overflow prevention in food processing lines.

• Chemical Industry

Ideal for chemical powder and granular solid raw material detection. The fully enclosed dustproof and durable structure ensures stable operation in dusty, harsh chemical workshops, guaranteeing safe batching and conveying processes.

• Building Materials & Mining Industry

Applicable for cement powder, mineral powder, sand and other heavy bulk materials. Adjustable torque adapts to different material specific gravities, with wear-resistant mechanical structure suitable for long-term continuous operation in mining and building material scenarios.

• Feed & Agricultural Processing

Used for level detection of feed particles and grain materials in storage silos. Lightweight and easy to install, it realizes real-time material level early warning and automatic feeding control for agricultural processing equipment.

Quality and reliable after-sales service are our core commitments. All rotary paddle level switches undergo strict factory testing to guarantee consistent performance in industrial working conditions.

• 12-Month Limited Warranty

We provide a 12-month warranty from the delivery date. The warranty covers all failures caused by defective materials or workmanship. We offer free repair or replacement for qualified faulty products.

• Lifelong Basic Technical Support

Our professional engineering team provides free pre-sales selection advice, on-site installation guidance and remote fault solving.

• Transportation Protection

Each unit adopts shockproof and reinforced packaging to avoid collision and damage during long-distance shipping.

• Continuous Spare Parts Supply

We supply original spare parts at reasonable prices for long-term equipment maintenance.

• Customization Follow-up

We fully cooperate with your special requirements on connection size, detecting torque and installation methods.

Note: The warranty does not cover damage caused by incorrect installation, improper operation or normal wear of wearable parts.

Feel free to contact us if you have any questions about warranty, installation or customization.

Q1: What types of materials can this switch detect?

A1: It is designed for point level monitoring of powder, granular and gel-like bulk solids, widely used in silos and hoppers across food, chemical, building material and agricultural industries.

Q2: How does the rotary paddle level switch work?

A2: Driven by a miniature motor, the paddle rotates normally when no material exists. Once blocked by materials, the motor stops and the internal circuit outputs a switch signal for level alarm and automatic control. It will reset automatically when the material level drops.

Q3: What power supply and output signal does it support?

A3: Compatible with AC 220V, AC 110V and DC 24V. It adopts SPDT contact output (COM/NO/NC) with rating 5A @ 250V AC, matching most industrial control systems.

Q4: Can I adjust the detecting torque?

A4: Yes. The torque range is 0.1~1.0 kg·cm and fully adjustable. You can set proper torque according to different material density to avoid false triggering.

Q5: Does it require regular maintenance?

A5: It features compact structure and strong overload protection. Only simple regular cleaning for the paddle and sealing parts is needed, no complicated disassembly maintenance required.

Q6: What is your warranty policy?

A6: We offer a 12-month warranty against defects in materials and workmanship starting from delivery. Lifelong basic technical support is also provided for all users.

Q7: Are custom solutions available?

A7: Yes. We support customized process connections, special torque and installation methods to meet various on-site requirements.

For detailed specifications, customized solutions or pricing information, click the button below to get in touch.

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