Hall-effect impeller water flow sensor

Main Features:

This series of Hall‑effect impeller‑type water flow sensors is a high‑precision sensing element specifically designed for liquid flow measurement. It features a food‑grade engineering‑plastic housing and an integrated impeller structure; liquid flow drives the impeller to rotate, while a Hall sensor detects changes in the magnetic field, generating a pulse signal proportional to the flow rate. This enables real‑time monitoring and accurate metering of liquid flow. The sensor offers a wide flow‑measurement range, fast response, and strong anti‑interference performance, and can be directly installed in liquid pipelines. It is widely used in household appliances and industrial equipment for flow monitoring, dry‑burn protection, and water‑usage metering applications.

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Category:

Water Flow & Water Level Sensors

Keyword: Hall-effect impeller water flow sensor

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Key Features

Principle of 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.
Food-grade material, safe and reliable. The housing is made of food-grade engineering plastic, resistant to acid and alkali corrosion, compliant with potable water contact safety standards, and compatible with a wide range of drinking water dispensers.
Wide flow detection range It can detect extremely low flow rates as low as 0.1 L/min, with a maximum support of 10 L/min (adjustable according to specifications), meeting the flow‑monitoring requirements of various devices.
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.
Fast response with low hysteresis It responds rapidly to changes in fluid flow, exhibits minimal hysteresis, and provides real-time feedback on the flow conditions within the pipeline, making it well-suited for dynamic flow monitoring applications.
Standardized interfaces facilitate easy integration. Standard configuration includes a straight‑in pipe connector and a PH2.54 connector, with a three‑wire pulse output that can be directly interfaced with an MCU or PLC control system, ensuring convenient installation.
Long-life, wear-resistant design : The impeller structure has been optimized to reduce flow resistance and wear, enabling long-term continuous operation with a service life exceeding 100,000 cycles.
Environmental Compliance Support : Compliant with RoHS and REACH environmental standards, lead-free manufacturing, and meets global market regulatory requirements.

Typical application scenarios

Home appliance sector : Flow monitoring and low-water protection for water purifiers, water dispensers, coffee machines, ice makers, and sparkling water makers.
Smart home sector : Water flow detection and dry‑burn protection control for smart water heaters, humidifiers, and smart toilets.
Industrial control field : Liquid flow monitoring and metering for small cooling systems, cleaning equipment, and inkjet printers.
Medical equipment sector : Liquid flow rate measurement and pipeline condition monitoring for infusion pumps, nebulizers, and disinfection equipment.
Other scenarios : Flow rate monitoring of small liquid pipelines, equipment operating status surveillance, water consumption measurement, and water-saving control.

Technical Specifications

Detection principle: Hall effect + impeller-type flow detection
Housing material: Food-grade engineering plastics (PP/ABS optional)
Pipeline Interface: Standard push‑in connector (compatible with common hose sizes; customizable)
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: 0.1–10 L/min (range can be customized upon request)
Measurement accuracy: Typical error ≤ ±5%
Response time: <100 ms
Operating temperature: 0°C to +60°C
Liquid Compatibility: Clear water, mildly corrosive transparent liquids (non‑high‑viscosity / 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 meet regulatory requirements.

Customized Services

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

Customization of pipeline interface dimensions and materials to accommodate varying pipe diameters and liquid‑medium requirements.
Targeted optimization of flow range, pulse coefficient, and output signal type (NPN/PNP/ push-pull)
Customizable compatibility with supply voltage, lead length, and connector type, enabling direct interface integration with customer equipment.
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 functionality.

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