Plastic Hall-effect water flow sensor

Main Features:

This series of external‑thread plastic Hall‑effect water flow sensors is an economical flow‑detection component specially designed for home appliances and water‑purification devices. It features a food‑grade engineering‑plastic housing with a standard external‑thread connection, along with a built-in precision impeller and Hall‑effect sensing element. When liquid flow drives the impeller to rotate, the sensor outputs a pulse signal proportional to the flow rate, enabling real-time monitoring and measurement of fluid flow. Made from food‑grade plastic, it is safe and non‑toxic, compatible with potable‑water piping, easy to install, and cost‑effective, making it widely used for flow monitoring, dry‑burn protection, and water‑usage metering in applications such as water purifiers, water heaters, coffee machines, and commercial water dispensers.

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Category:

Water Flow & Water Level Sensors

Keyword: Plastic Hall-effect water flow sensor

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Key Features

Food-grade engineering plastic material The housing is made of food-grade engineering plastic, ensuring safety and non-toxicity, with resistance to acid and alkali corrosion, compliant with potable water contact standards, and compatible with a wide range of drinking water dispensers.
Standard external threaded interface Standard external threaded connection, allowing direct integration into residential or commercial piping systems; easy to install, with excellent sealing performance and resistance to leaks.
Stable Hall Effect Detection : The impeller’s rotation triggers the Hall-effect sensor to output a pulse signal, which is stable, highly resistant to interference, and unaffected by slight water turbidity.
Wide measurement range for medium flow rates It can detect flow rates as low as 0.3 L/min, with a maximum support of 20 L/min (adjustable according to specifications), and is compatible with the flow‑monitoring requirements of various home appliances.
High-precision flow measurement : The pulse output signal exhibits high linearity, with a metering error of ≤±5%, enabling precise flow measurement and low-water-level alarms.
Low-power, wide-voltage adaptation : Supports a wide input voltage range of DC 3.3–5 V, with a typical operating current of ≤15 mA, and is compatible with various home appliance control boards.
Standardized interfaces facilitate easy integration. Standard configuration includes a PH2.54 connector and a three-wire pulse output, enabling direct connection to an MCU or PLC control system, with convenient installation and wiring.
Long-life, wear-resistant structure : The impeller structure has been optimized to reduce flow resistance and wear, enabling long-term continuous operation and meeting the service-life requirements of household appliances.
Environmental Compliance Support : Compliant with RoHS and REACH environmental standards, lead-free manufacturing, and meets global market regulatory requirements.

Typical application scenarios

Water purification equipment sector : Flow monitoring and water consumption measurement for household and commercial water purifiers, direct-drinking water dispensers, and water coolers.
Home appliance sector : Flow monitoring and dry‑burn protection for electric water heaters, gas water heaters, coffee makers, and ice makers.
Smart home sector : Water flow detection and status monitoring for smart toilets and whole-house water purification systems.
Other scenarios : Flow rate monitoring for small liquid pipelines, equipment operating status surveillance, water-saving control, and flow feedback.

Technical Specifications

Detection principle: Hall effect + impeller-type flow measurement
Housing material: Food-grade engineering plastics (PP/ABS optional)
Pipeline interface: Standard G1/2" male thread (other specifications available upon request)
Operating voltage: DC 3.3–5 V (compatible with optional 5 V/12 V)
Operating current: ≤15 mA
Output signal: Pulse signal (NPN open-collector / push-pull output optional)
Flow measurement range: 0.3–20 L/min (range can be customized upon request)
Measurement accuracy: Typical error ≤ ±5%
Response time: <100 ms
Operating temperature: 0°C to +60°C (for liquid media)
Pressure rating: ≥0.8 MPa (higher pressure ratings available upon request)
Liquid Compatibility: Clean water, mildly corrosive transparent liquids (non‑high‑viscosity and free of particulates)
Interface type: PH2.54 3-pin connector, standard configuration includes red, yellow, and black leads.
Environmental Compliance: RoHS and REACH compliant; food-grade contact materials are in compliance.

Customized Services

We offer end-to-end customized services and, based on your application scenarios and design requirements, can provide the following tailored solutions:

Customized specifications for pipeline interfaces and thread standards, tailored to meet diverse piping requirements.
Targeted optimization of flow range and pulse coefficient to meet the flow‑measurement requirements of specific equipment.
Customization of output signal format, supply voltage, lead length, and connector type compatibility.
We offer mass production and rapid delivery services, along with comprehensive technical support, product selection solutions, and test reports, helping customers efficiently develop device‑level flow‑monitoring capabilities.

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