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Pressure Transmitter with Display

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Rotary Paddle Level Switch Manufacturer In India

Product Name: Rotary Paddle Level Switch.

Product Variants:

  • ● Standard Rotary Paddle
  • ● Extended Length
  • ● Flanged/Threaded types

Product Overview / Description:

Kuncham Controls’ Rotary Paddle Level Switch is engineered for robust detection of solid material levels in silos, bins, and hoppers. Used in bulk solids handling, the device employs a slow-rotating paddle that stops upon contact with material, activating a switch for bin empty or full alarms and process control. Kuncham Controls designs both standard and extended-length models to serve diverse installation needs. These switches offer high reliability for cement, food grains, plastics, and chemicals—delivering consistent results even in demanding environments.

Pressure Indicator Transmitter with Screwed Connection
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Types of Rotary Paddle Level Switch We Manufacture

Rotary Paddle Level Switch
Rotary Paddle Level Switch

Uses a rotating paddle to detect the presence or absence of materials in a tank or silo.

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Rotary Paddle Level Switch Extended
Rotary Paddle Level Switch Extended

This Rotary Paddle designed for measuring levels in deeper or taller tanks and silos.

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Rotary Paddle Level Switch with Flanged End
Rotary Paddle Level Switch Flanged

This Rotary Paddle engineered for secure and leak-proof installation in tanks or silos.

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Working Principles of Rotary Paddle Level Switch:

A rotary paddle switch operates on the principle of mechanical rotation and material resistance detection. The device features a motor-driven rotating paddle that is inserted into a bin, hopper, or silo containing bulk solids such as grains, powders, or granules. When the material level is low, the paddle rotates freely. As the material rises and comes into contact with the paddle, the rotation is restricted, causing the motor to stall momentarily. This resistance is mechanically detected, which in turn activates a micro-switch. The micro-switch can then be used to trigger alarms, stop filling operations, or initiate process interlocks, ensuring precise level control and preventing overfilling or underfeeding conditions. This simple yet reliable mechanism provides accurate bulk solids detection and works efficiently across a wide range of industries handling cement, grains, plastics, fertilizers, and powders.

Key Features / Highlights:

  • ● Die-cast aluminum enclosure
  • ● Adjustable probe length (100 mm–3000 mm)
  • ● High/low-level detection
  • ● SPDT/DPDT micro-switch output
  • ● Weatherproof and flameproof options
  • ● Power fail-safe design.

Technical Specifications:

  • ● Temperature: −20°C to 350°C
  • ● Power: 110–220 VAC/24 VDC
  • ● Cable Glands: 13.5 PG/M20
  • ●Output: SPDT/DPDT relay
  • ● Probe Material: SS304/316

Applications / Industry Use:

  • ● Cement and minerals plants
  • ● Plastics and food processing
  • ● Agriculture silos
  • ● Chemical and power industries

Why Choose Kuncham Controls for Rotary Paddle Level Switch:

Kuncham Controls Pvt. Ltd. is a leading manufacturer of high-performance rotary paddle switches, trusted by industries for their rugged construction, precise engineering, and long service life. Our switches are designed to provide consistent, maintenance-free operation even in dusty, abrasive, or high-vibration environments. Each product undergoes stringent quality testing to ensure reliability and smooth performance under varying process conditions. Our rotary paddle switches are also customizable for different material densities, mounting options, and electrical configurations, making them adaptable to diverse applications. Customers choose Kuncham Controls for robust performance, hassle-free operation, and prompt technical support, which help minimize downtime and improve operational efficiency in bulk material handling systems.

Rotary Paddle Level Switch — Q&A

Find answers to common questions about our rotary paddle level switches.

A rotary paddle level switch is a point-level detection device used mainly for bulk solids. At Kuncham Controls, our rotary paddle switches operate with a small motor that continuously rotates a paddle. When material reaches the paddle, it prevents rotation. This resistance is sensed by the internal mechanism, which then triggers an electrical output (alarm, motor stop, or indication). Once the material level drops, the paddle is free again and the switch resets.

Kuncham Controls rotary paddle switches are suitable for a wide range of dry bulk solids, including:

  • Powders: cement, flour, fine chemicals
  • Granules: plastic pellets, grains, seeds
  • Chips and flakes: wood chips, feed materials
  • Pellets and lumps: with moderate density
  • Food grains: rice, wheat, pulses

They work best in silos, hoppers, bins, and storage tanks.

Consider the following parameters:

  • Material type and density (rotary paddles are ideal for materials with density typically above 100 g/L)
  • Mounting position (top, side, or extended length requirement)
  • Temperature and pressure conditions inside the silo
  • Power supply and electrical output needed
  • Paddle design (single blade, multi-blade, or specialized paddles based on material flow)
  • Build-up tendency of your material

Share your application details with Kuncham Controls, and we will help select the best model and paddle configuration.

Installation and upkeep are straightforward:

  • Mount the unit firmly to avoid vibration effects
  • Ensure the paddle is correctly positioned and free to rotate
  • Avoid installing too close to filling points where heavy impact may occur
  • Use extended models for deep silos if required
  • Periodically clean the paddle and housing in dusty or sticky materials
  • Inspect wiring, seals, and the motor for smooth operation
  • Perform periodic functional tests to ensure reliable switching

Kuncham Controls provides installation support and maintenance guidance for long-term performance.

Common problems and solutions include:

  • Paddle not rotating: Check motor power, internal gear wear, or material jam inside the housing.
  • False alarms: Caused by vibration, incorrect sensitivity setting, or paddle touching the tank wall.
  • Continuous rotation even when material is present: Inspect clutch, torque mechanism, or excessive material build-up.
  • Delayed response: Could be due to sticky materials or worn paddles.

If problems persist, Kuncham Controls Technical Support can help diagnose or repair the unit quickly to reduce downtime.

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