Miniature Hall-effect Impeller Water Flow Sensor

Main Features:

This series of miniature Hall‑effect impeller‑type water flow sensors is a compact flow‑measurement device specially designed for small‑diameter liquid pipelines. Featuring a food‑grade engineering‑plastic housing and a precision micro‑impeller, the sensor uses an integrated Hall sensor to detect magnetic field changes as the fluid drives the impeller to rotate, generating a pulse signal proportional to the flow rate. This enables real‑time monitoring and accurate measurement of liquid flow. With its small footprint and easy installation, the sensor offers a wide flow‑range and rapid response, making it ideal for flow monitoring, dry‑burn protection, and water‑usage metering in a variety of small household appliances, medical devices, and industrial systems.

Enquiry

Category:

Water Flow & Water Level Sensors

Keyword: Miniature Hall-effect Impeller Water Flow Sensor

DETAILS DOWNLOAD

Key Features

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, unaffected by slight water turbidity, and boasts high reliability.
Food-grade safe material 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.
Ultra-compact, small-caliber design : Compact in overall size, it features a direct‑plug connection to small‑diameter hoses, saving installation space and making it ideal for integration into small household appliances and compact devices.
Wide flow detection range It can detect extremely low flow rates as low as 0.05 L/min, with high metering accuracy, meeting the flow‑monitoring and low‑water‑level alarm requirements of various devices.
High-precision flow measurement : The pulse output signal exhibits excellent linearity, with a metering error of ≤±5%, enabling precise flow measurement and dry‑burn protection.
Low-power, wide-voltage compatibility : Supports a wide input voltage range of DC 3.3–5 V, with a typical operating current of ≤15 mA, making it suitable for battery-powered applications or low-voltage control devices.
Standardized interfaces facilitate 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 stability requirements for prolonged equipment performance.
Environmental Compliance Support : Compliant with RoHS and REACH environmental standards, lead-free manufacturing, and meets global market regulatory requirements.

Typical application scenarios

Small home appliance sector : Flow monitoring and low-water protection for water purifiers, water dispensers, coffee machines, sparkling water makers, and ice makers.
Smart home sector : Water flow detection and dry‑burn protection control for smart toilets, compact humidifiers, and portable drinking water devices.
Medical equipment sector : Liquid flow rate measurement and pipeline condition monitoring for infusion pumps, nebulizers, and small-scale disinfection devices.
Industrial control field : Liquid flow monitoring and metering for small cooling systems, inkjet printers, and cleaning equipment.
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 + micro-impeller flow sensing
Housing material: Food-grade engineering plastic (PP/ABS optional)
Pipeline Interface: Standard small‑diameter 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: 0.05–5 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: Clean 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 wire length, and connector type, enabling direct interface connection to 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.

ENQUIRY

If you have any good suggestions and comments on our company, or want to consult our products, please fill in the form below, and we will contact you at the first time!