Hongnuo (shenyang) General Machinery Co., Ltd. is one of the most reliable manufacturers and suppliers of rotating paddle level switch in China. Welcome to buy high quality rotating paddle level switch at competitive price from our factory. We also accept customized orders.
The HNL40-A rotating paddle level switch is an industrial-grade device engineered for precise monitoring of full, intermediate, and empty levels in solid material silos, suitable for powders, granules, pastes, and blocks across diverse sectors. Leveraging a simple yet robust working principle-low-speed gear motor driving a rotating paddle-this switch triggers a microswitch when material resists paddle rotation, cutting off motor power; the internal spring resets the paddle once resistance is removed, ensuring automatic and continuous level control.
Crafted with SUS304 stainless steel, the switch boasts dust resistance, immunity to dielectric constant changes, and stability under varying temperatures (-20~1300℃ customizable) and pressures, making it ideal for metallurgy, grain, cement, chemicals, pharmaceuticals, and food processing. It features modular design for maintenance-free operation, advanced mechanical sealing to prevent dust infiltration, and a friction clutch to protect the motor from damage. Flexible installation options (G1"/G1-½" threads, custom flanges) and optional extensions adapt to different silo depths (80~6000mm), while IP65-IP67 protection ratings enhance durability in harsh environments.
Supporting multiple power supplies (110VAC/220VAC/24VAC/24VDC) and SPDT microswitch output (5A/250VAC), the HNL40-A rotating paddle level switch delivers consistent performance for materials with specific gravity ≥0.3g/cm³. Its versatility, reliability, and resistance to harsh conditions make it a top choice for industrial solid material level management. Whether for bulk storage tanks or automated production lines, this switch ensures accurate, real-time monitoring to optimize material handling and prevent operational disruptions.
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HNL40-A Rotary Level Switch Parameters |
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Specific Parameters |
Value / Description |
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Measurement Principle |
The HNL40-A rotary paddle level switch uses a low-speed geared motor with a sliding clutch to drive a rotating measuring blade. When the material being measured obstructs the blade's rotation, the motor rotates, activating an internal microswitch and outputting a detection signal. Simultaneously, the motor power is cut off, stopping the supply of power. (Detection state) Once the material being measured is no longer present, the blade, no longer obstructing the movement, resets due to internal spring tension. The detection signal is then switched back, and power is restored to the motor, causing the blade to resume rotation. |
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Product Type |
Standard thread type |
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Measurement Range |
80~1000mm, 100~1500mm, 100~2000mm, 300~3000mm, 450~6000mm, 100~6000mm, |
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Output Signal |
NPN, PNP, Relay output |
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Power Supply |
24VDC (DC), 220VAC (AC) |
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Process Connection |
Threads, flanges, Customizable |
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Electrical Connection |
Terminal wiring |
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Temperature Range |
-20-80°C, -20-350°C, -20-1300°C, -40-350°C, -20-250°C, Customized |
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Junction Box Material |
luminum alloy with painted finish/PEK/stainless steel |
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Shell Material |
304 Stainless steel |
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Protection Level |
IP65 |
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Protection Level |
Non-explosion-proof type |
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Certificate |
CE certified |
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Ordering Information |
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