Description
The PP Plastic Duckbill Float Switch (Type-D, 0~220V) is a side-mounted liquid level sensor designed for reliable water level detection and control in compact equipment and small tanks. Its “duckbill” float arm pivots horizontally, making it suitable for installations where vertical top-mounting is impractical—such as coffee machines, humidifiers, water dispensers, and HVAC condensate pans .
The switch operates on a passive magnetic principle: a magnet embedded in the float actuates a sealed reed switch inside the stem as the liquid level changes, producing a dry contact closure that requires no external power for the sensing element . The PP (polypropylene) body offers good resistance to weak acids and alkalis, excellent electrical insulation, and food-grade suitability for potable water applications . The Type-D designation in supplier naming typically denotes the M12 thread and 220V-class voltage rating for this configuration.
Critical limitations: This is a passive switch, not a continuous level transmitter. The contact rating is typically limited to around 0.5–1A—do not connect pumps or motors directly without a relay . PP material is not suitable for oils, strong acids, organic solvents, or temperatures above its rated limit .
Features
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Side-Mount Duckbill Design: Compact float arm pivots horizontally for narrow tanks and tight spaces where vertical switches cannot fit .
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PP Corrosion-Resistant Body: Polypropylene construction suitable for water and light chemical environments; food-grade for potable water applications .
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Passive Magnetic Reed Operation: No power supply required for the sensing element; the float magnet actuates the sealed reed switch .
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M12 Threaded Mounting: Standard M12 thread for secure side-wall installation .
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220V-Class Voltage Rating: Suitable for direct connection to low-power AC/DC control circuits, PLC inputs, and relay coils .
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Configurable NO/NC Operation: Contact state can typically be inverted by flipping the float orientation on the stem .
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Compact and Lightweight: Low-mass float responds quickly to small level changes.
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Wide Application Compatibility: Suitable for water dispensers, coffee machines, humidifiers, and small tanks .
Technical Specifications
| Parameter | Specification (Type-D, 220V variant) |
|---|---|
| Model Type | Duckbill Side-Mount Float Switch, Type-D |
| Body Material | PP (Polypropylene) |
| Mounting Thread | M12 |
| Switching Voltage | 0~220V AC/DC (typical for PP float switches) |
| Switching Current | ~0.5–1A (verify with supplier; do not exceed) |
| Operating Temperature | -20°C to +60°C (per your listing; typical PP rating is higher) |
| Contact Type | Reed switch (NO/NC configurable by float orientation) |
| Cable Length | ~400mm (typical for this class) |
| Medium Specific Gravity | Must be greater than float’s rated minimum (typically >0.55 for PP floats) |
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