{"title":"Liquid Flow Meter - Plastic 1/2 NPS Threaded","handle":"liquid-flow-meter-plastic-1-2-nps-threaded","url":"/products/liquid-flow-meter-plastic-1-2-nps-threaded","description":"An inline flow sensor for measuring liquid or water flow in solar heating, computer cooling, irrigation, and other fluid projects. The sensor uses a pinwheel with a magnet and an external hall effect sensor to count rotations through the plastic wall, keeping the electronics safe and dry.\n\nEach pulse from the sensor output corresponds to approximately 2.25 millilitres of fluid. Connect the three-wire interface to any microcontroller to start tracking flow rate and total volume in your project.\n\nKey Features\n\n\nHall Effect Sensing – Non-contact magnetic detection through the plastic housing keeps electronics dry\n\n1/2\" NPS Threaded – Standard threading for easy inline installation\n\nWide Voltage Range – Operates on 5–24V DC\n\nSimple 3-Wire Interface – Red (power), black (ground), yellow (pulse output)\n\n~2.25mL per Pulse – Count pulses to calculate flow volume\n\n\n\nNote: This is not a precision sensor. Pulse rate varies with flow rate, fluid pressure, and sensor orientation. Careful calibration is recommended if better than 10% accuracy is required.\n\n\nIdeal For\n\nGarden and irrigation monitoring\nSolar heating systems\nComputer liquid cooling loops\nAquaponics and hydroponic setups\n\n\nPackage Contents\n\n1× Plastic liquid flow meter (1/2\" NPS threaded)\n\n\nResources\n\nArduino example sketch (GitHub)\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":13800,"title":"Default Title","sku":"AF-828","price":24.23,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":57,"option1":"Default Title"}]}