{"product_id":"dc-5-18v-hall-effect-water-flow-sensor-liquid-switch","title":"DC 5-18V Hall Effect Water Flow Sensor – 1-30L\/min","description":"\u003cp\u003eMonitor and manage your water systems with confidence using this \u003cstrong\u003eDC 5-18V Hall Effect Water Flow Sensor\u003c\/strong\u003e. Designed for a wide range of home, garden, and DIY automation projects, this compact flowmeter accurately detects liquid flow rates and sends a clean pulse signal to your controller or microcontroller — making it ideal for irrigation systems, water dispensers, aquariums, and more.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Voltage Range:\u003c\/strong\u003e Compatible with DC 5V to 18V power supplies, including standard 12V systems — versatile enough for most projects.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHall Effect Technology:\u003c\/strong\u003e Uses an imported Hall effect element for reliable, non-contact flow detection and accurate pulse output.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWaterproof Construction:\u003c\/strong\u003e The seal ring is designed with top-to-bottom compression force to prevent water leakage. The wiring is fitted with a waterproof seal rubber ring, and inlet waterproof silicone further reinforces moisture protection.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlow Rate:\u003c\/strong\u003e Measures liquid flow from 1–30 L\/min, suitable for a variety of low-to-medium flow applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRated Working Pressure:\u003c\/strong\u003e Up to 1.75 MPa — built to handle real-world water pressure conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy Wiring:\u003c\/strong\u003e Simple 3-wire connection — red wire to positive (VCC), black wire to ground (GND), yellow wire to signal output.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Plastic Body:\u003c\/strong\u003e Lightweight yet sturdy housing that resists corrosion and is easy to clean.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAvailable in 2 Color Options:\u003c\/strong\u003e Choose the style that fits your setup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Voltage:\u003c\/strong\u003e DC 5V – 18V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlow Range:\u003c\/strong\u003e 1 – 30 L\/min\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e ≤ 1.75 MPa\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Plastic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Type:\u003c\/strong\u003e Hall pulse signal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e 3-wire (VCC \/ GND \/ Signal)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eIdeal For\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eGarden drip irrigation controllers\u003c\/li\u003e\n  \u003cli\u003eAquarium and fish tank water management\u003c\/li\u003e\n  \u003cli\u003eDIY water dispensing and vending machines\u003c\/li\u003e\n  \u003cli\u003eArduino, Raspberry Pi, and other microcontroller projects\u003c\/li\u003e\n  \u003cli\u003eHousehold water monitoring systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Tips\u003c\/h2\u003e\n\u003cp\u003eConnect the \u003cstrong\u003ered wire\u003c\/strong\u003e to your power supply positive (VCC), the \u003cstrong\u003eblack wire\u003c\/strong\u003e to ground (GND), and the \u003cstrong\u003eyellow wire\u003c\/strong\u003e to your signal\/input pin. Ensure all connections are secure and waterproofed before operation. Mount the sensor in line with the water flow direction as indicated on the body.\u003c\/p\u003e\n\n\u003cp\u003eFor guidance on safe electrical wiring and DIY project safety standards, visit the U.S. Consumer Product Safety Commission (CPSC).\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What voltage does this Hall Effect water flow sensor support?\u003c\/h4\u003e\n\u003cp\u003eA: This flow sensor operates on DC 5V to 18V, making it compatible with common 5V and 12V power sources used in Arduino, Raspberry Pi, and standard irrigation or home automation setups.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How does the Hall Effect flow sensor work?\u003c\/h4\u003e\n\u003cp\u003eA: Inside the sensor, a rotor spins as liquid flows through. A magnet on the rotor triggers the Hall effect element, generating a pulse signal proportional to the flow rate. Your microcontroller counts these pulses to calculate the volume or speed of liquid passing through.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this water flow sensor waterproof?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The sensor features a top-to-bottom compression seal ring design, a waterproof rubber ring around the wiring, and inlet waterproof silicone reinforcement to guard against moisture ingress and leakage.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the maximum flow rate and pressure this sensor handles?\u003c\/h4\u003e\n\u003cp\u003eA: This sensor measures liquid flow rates from 1 to 30 litres per minute and is rated for working pressures up to 1.75 MPa, suitable for most residential and light commercial water systems.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I use this sensor in an aquarium or garden irrigation system?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. This flow sensor is well-suited for garden drip irrigation controllers, aquarium water management, DIY dispensers, and any project where monitoring or controlling liquid flow is needed.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What voltage does this Hall Effect water flow sensor support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This flow sensor operates on DC 5V to 18V, making it compatible with common 5V and 12V power sources used in Arduino, Raspberry Pi, and standard irrigation or home automation setups.\"}}, {\"@type\": \"Question\", \"name\": \"How does the Hall Effect flow sensor work?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Inside the sensor, a rotor spins as liquid flows through. A magnet on the rotor triggers the Hall effect element, generating a pulse signal proportional to the flow rate. 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