{"product_id":"fs400a-hall-water-flow-sensor-nylon-pulse-meter-1-inch-large-pipeline","title":"FS400A Hall Water Flow Sensor 1\" Nylon Pulse Meter 2-60L\/min","description":"\n\u003ch2\u003eFS400A Hall Effect Water Flow Sensor – High-Precision Pulse Flow Meter for Large Pipelines\u003c\/h2\u003e\n\u003cp\u003eMeet the \u003cstrong\u003eFS400A Hall Water Flow Sensor\u003c\/strong\u003e — a rugged, high-precision nylon flow meter designed for large-pipeline applications. Whether you're building an automated irrigation system, a DIY water-monitoring station, or an industrial fluid-control circuit, this sensor delivers reliable, real-time flow data with a wide operating voltage range of \u003cstrong\u003eDC 3.5 V – 24 V\u003c\/strong\u003e and a flow range of \u003cstrong\u003e2–60 L\/min (±5%)\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eUsing a Hall-effect turbine mechanism, the sensor outputs clean digital pulses (Hz = 6×Q − 2, equating to approximately \u003cstrong\u003e358 pulses per liter\u003c\/strong\u003e) that any microcontroller — Arduino, Raspberry Pi, PLC, or custom circuit — can read and convert into accurate volumetric flow data.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eMade in Mainland China.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Voltage Compatibility:\u003c\/strong\u003e Operates at DC 3.5 V to 24 V — works with virtually any microcontroller or control board.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Flow Range:\u003c\/strong\u003e Accurately measures 2–60 L\/min (±5%) — ideal for large-bore pipeline installations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Pressure Rating:\u003c\/strong\u003e Withstands up to 1.75 MPa, suitable for demanding water systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Nylon Body:\u003c\/strong\u003e Lightweight yet robust nylon construction resists corrosion and everyday wear.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1-Inch Interface:\u003c\/strong\u003e Standard 1″ threaded fitting (inner diameter 20 mm \/ outer diameter 32.7 mm, thread length 13 mm) for easy integration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Insulation:\u003c\/strong\u003e Insulation resistance \u0026gt;100 MΩ for safe, reliable operation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClean Pulse Output:\u003c\/strong\u003e Hall-effect design produces precise digital pulses with minimal signal noise — 358 pulses\/liter for straightforward flow calculation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eFS400A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eNylon\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eInterface Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e1 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eInner \/ Outer Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e20 mm \/ 32.7 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eThread Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e13 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eWorking Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eDC 3.5 V – 24 V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eFlow Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e2–60 L\/min (±5%)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eWater Pressure Resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u0026lt; 1.75 MPa\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003ePulse Characteristics\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eHz = (6×Q − 2); ≈ 358 pulses\/liter\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eInsulation Resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u0026gt; 100 MΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× FS400A Hall Water Flow Sensor \/ Pulse Flow Meter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHelpful Resources\u003c\/h3\u003e\n\u003cp\u003eFor guidance on electrical safety standards in DIY electronic projects, visit the \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety page\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What microcontrollers are compatible with the FS400A Hall Water Flow Sensor?\u003c\/h4\u003e\n\u003cp\u003eA: The FS400A outputs a standard digital pulse signal and is compatible with most popular microcontrollers including Arduino (Uno, Mega, Nano), Raspberry Pi, ESP8266\/ESP32, and industrial PLCs. Any controller that can read a digital interrupt or digital input pin and operate within the DC 3.5 V–24 V supply range will work seamlessly.\u003c\/p\u003e\n\u003ch4\u003eQ: How do I calculate the flow rate from the pulse output?\u003c\/h4\u003e\n\u003cp\u003eA: The sensor follows the formula Hz = (6×Q − 2), where Q is the flow rate in liters per minute (L\/min). Rearranging: Q = (Hz + 2) \/ 6. The sensor produces approximately 358 pulses per liter, making it straightforward to calculate cumulative volume in your firmware or software.\u003c\/p\u003e\n\u003ch4\u003eQ: Is the FS400A suitable for hot water or chemical fluids?\u003c\/h4\u003e\n\u003cp\u003eA: The FS400A is designed primarily for clean, cold water applications. The nylon body offers good general fluid resistance, but it is not rated for high-temperature fluids or aggressive chemicals. For such applications, consider a stainless-steel or brass-body flow sensor instead.\u003c\/p\u003e\n\u003ch4\u003eQ: What pipe size does the FS400A fit?\u003c\/h4\u003e\n\u003cp\u003eA: The sensor features a standard 1-inch threaded interface (inner diameter 20 mm, outer diameter 32.7 mm, thread length 13 mm), making it straightforward to integrate into standard 1-inch pipework using common plumbing fittings.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What microcontrollers are compatible with the FS400A Hall Water Flow Sensor?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The FS400A outputs a standard digital pulse signal and is compatible with most popular microcontrollers including Arduino (Uno, Mega, Nano), Raspberry Pi, ESP8266\/ESP32, and industrial PLCs. 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