Description
The ZP5210 is a compact vertical-mount float switch designed for liquid level detection and control in small tanks, aquariums, water dispensers, and household appliances. It operates on a passive magnetic reed principle: a magnetic float moves vertically along the stem as liquid level changes, actuating a sealed reed switch inside the tube to open or close a circuit . The switch requires no external power for the sensing element—it is a dry contact device that simply makes or breaks a connection when the float reaches its actuation point.
The PP (polypropylene) construction provides resistance to water and weak chemical environments, making it suitable for potable water and light industrial applications . With a contact rating of 10W and a switching current of 0.5A, this switch is intended for low-power control circuits—it should drive a relay or PLC input rather than a pump or motor directly . The float orientation can be inverted to convert between Normally Closed (NC) and Normally Open (NO) operation; the factory default is NC when mounted with the float hanging downward . The 40cm cable length provides routing flexibility for control panel connections .
Critical limitations: This is a passive switch, not a continuous level transmitter. The contact rating is limited to 0.5A—do not connect pumps, solenoids, or motors directly without a relay or contactor . The PP body is not suitable for oils, strong solvents, or concentrated acids.
Features
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Vertical Float Design: Compact cylindrical float moves along the stem for top-mounting in small tanks and reservoirs .
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PP Corrosion-Resistant Body: Polypropylene construction suitable for water and weak chemical environments .
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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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10W / 0.5A Contact Rating: Suitable for low-power control circuits, PLC inputs, and relay coils .
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Configurable NC/NO Operation: Factory default NC; invert the float orientation to convert to NO .
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40cm Cable Length: Provides routing flexibility for control panel connections .
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M10 Thread: Approximately 10mm thread diameter for standard tank fittings .
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Wide Application Compatibility: Used in aquariums, water dispensers, humidifiers, coffee machines, and small tanks .
Technical Specifications
| Parameter | Specification (most commonly cited) |
|---|---|
| Model | ZP5210 |
| Body Material | PP (Polypropylene) |
| Mounting Type | Vertical (top-mount) |
| Contact Capacity | 10W |
| Max Switching Voltage | 100V DC (most suppliers); some list 110V DC |
| Max Switching Current | 0.5A |
| Max Breakdown Voltage | 220V DC |
| Max Carry Current | 1.0A |
| Contact Resistance | ≤100mΩ |
| Operating Temperature | -10~+85°C (most common); some list -10~+60°C |
| Thread Diameter | Approx. 10mm |
| Cable Length | 40cm (per your listing; some suppliers list 35cm) |
| Medium Specific Gravity | >0.6 |
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