{"product_id":"gravity-liquid-flow-sensor-g1-4-npn-pulse-output","title":"Gravity: Liquid Flow Sensor (G1\/4, NPN Pulse Output)","description":"\u003ch2\u003eIntroduction\u003c\/h2\u003e\n\u003cp\u003eGravity: Liquid Flow Sensor (G1\/4) is an electromagnetic‑principle flow measurement module designed for reliable liquid monitoring in compact fluid systems. This gravity‑series flow detection sensor integrates a sealed flow chamber, pulse output electronics, and standard threaded connectors to deliver stable readings across a wide operating voltage range. An internal sensing structure generates pulse signals proportional to the liquid passing through the channel, enabling straightforward integration with development platforms such as Arduino UNO. The compact inline meter supports measurement of high‑concentration, low‑viscosity liquids including water, diesel, engine oil, milk, paint, detergent, and honey in clean fluid environments.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0668\/0641\/5437\/files\/E38027-content1.webp?v=1791346452\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eElectromagnetic Flow Measurement with Pulse Output\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThis liquid flow monitoring module adopts an electromagnetic sensing mechanism that converts flow movement into stable NPN pulse signals. Each liter of liquid corresponds to a defined pulse count, allowing microcontrollers and embedded platforms to calculate flow rate and total volume through simple digital counting. Such architecture makes the gravity‑series sensor suitable for automated fluid monitoring systems, laboratory dispensing setups, and embedded IoT measurement devices where reliable pulse feedback simplifies firmware design and improves measurement consistency.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eEnhanced Sealing for Reliable Liquid Operation\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eAn internal O‑ring rubber seal combined with silicone sealing at the outlet interface improves water resistance and long‑term durability. This structural sealing design helps protect internal sensing components from leakage and external moisture, supporting stable operation under continuous fluid flow conditions. High anti‑interference capability and impact resistance further enhance operational reliability, making the compact inline flow meter suitable for demanding environments such as industrial monitoring setups, experimental liquid systems, and automated fluid management equipment.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eThreaded G1\/4 Interface for Easy System Integration\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA standard G1\/4 threaded inlet and outlet simplifies mechanical installation in tubing systems and fluid pipelines. The threaded design allows fast integration with common adapters, valves, and connectors used in laboratory or industrial liquid systems. Combined with a Gravity connector interface for electronics wiring, the compact flow sensing board reduces setup complexity during prototyping and embedded development. Broad operating voltage support from 3.5V to 24V also enables compatibility with a wide range of microcontroller platforms and control systems.\u003c\/p\u003e\n\u003cp\u003eThis compact gravity‑series liquid flow detection sensor fits fluid monitoring tasks such as dosing systems, experimental liquid measurement setups, automated equipment, and embedded monitoring projects. Reliable pulse output combined with a durable sealed structure enables stable measurement of low‑viscosity liquids across a variety of robotics, industrial automation, and STEM Education fluid‑control applications.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGravity connector design for simple and reliable wiring\u003c\/li\u003e\n\u003cli\u003eWide operating voltage range of 3.5–24V\u003c\/li\u003e\n\u003cli\u003eSupports measurement of high‑concentration, low‑viscosity liquids\u003c\/li\u003e\n\u003cli\u003eRoHS compliant\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eLiquid flow monitoring for low‑viscosity fluids\u003c\/li\u003e\n\u003cli\u003eLaboratory liquid measurement and dispensing systems\u003c\/li\u003e\n\u003cli\u003eAutomated fluid control and monitoring equipment\u003c\/li\u003e\n\u003cli\u003eEmbedded and STEM Education fluid measurement projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecification\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Voltage: DC3.5-24V\u003c\/li\u003e\n\u003cli\u003eOperating Current: ≤10mA（DC5V）\u003c\/li\u003e\n\u003cli\u003eOutput: NPN Pulse signal\u003c\/li\u003e\n\u003cli\u003ePipe Diameter: G1\/4\u003c\/li\u003e\n\u003cli\u003eThread Outer Diameter: 13mm\u003c\/li\u003e\n\u003cli\u003eThread Length: 10mm\u003c\/li\u003e\n\u003cli\u003eWater Pressure Resistance: ≤1.0MPA\u003c\/li\u003e\n\u003cli\u003eInsulation Resistance: ＞100MΩ\u003c\/li\u003e\n\u003cli\u003eError: ±1%(0.3-5L\/min)\u003c\/li\u003e\n\u003cli\u003eOutput Pulse High Level: ＞DC4.7V(Input voltage DC5V)\u003c\/li\u003e\n\u003cli\u003eOutput Pulse Low Level: ＜DC0.5V(Input voltage DC5V)\u003c\/li\u003e\n\u003cli\u003eOutput Pulse Duty Ratio: 50%±10%\u003c\/li\u003e\n\u003cli\u003eFlow-Pulse Correlation: 1L=540 pulses\u003c\/li\u003e\n\u003cli\u003eOperating Temperature Range: -10°~70°C\u003c\/li\u003e\n\u003cli\u003eOperating Humidity Range: 35%~90%RH(No condensing)\u003c\/li\u003e\n\u003cli\u003eStorage Temperature: -25°~+80°C\u003c\/li\u003e\n\u003cli\u003eStorage Humidity: 25%~95%RH\u003c\/li\u003e\n\u003cli\u003eDimension: 80*47*30mm\/3.15*1.85*1.18”\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eShipping List\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGravity: Liquid Flow Sensor (G1\/4) x1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDocuments\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/wiki.dfrobot.com\/sen0549\/\" target=\"_blank\"\u003eProduct Wiki\u003c\/a\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DFRobot","offers":[{"title":"Default Title","offer_id":67582102011981,"sku":"E38027-001","price":32.93,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/0641\/5437\/files\/E38027-win1.jpg?v=1791346502","url":"https:\/\/www.mlab.com.au\/products\/gravity-liquid-flow-sensor-g1-4-npn-pulse-output","provider":"MLAB","version":"1.0","type":"link"}