{"title":"Gravity: Photoelectric Arduino Water Liquid Level Sensor","handle":"gravity-photoelectric-arduino-water-liquid-level-sensor","url":"/products/gravity-photoelectric-arduino-water-liquid-level-sensor","description":"A photoelectric liquid level sensor that uses optical principles to detect the presence or absence of liquid. With no moving parts, it requires minimal calibration and offers high sensitivity and long service life. The corrosion-resistant polycarbonate probe handles temperatures from −25 °C to 105 °C.\n\nEquipped with a DFRobot Gravity interface adapter, the sensor connects directly to Arduino boards via a Gravity-compatible shield. It also operates at 3.3 V for compatibility with Raspberry Pi and other 3.3 V microcontrollers.\n\nKey Features\n\n\nPhotoelectric Detection – No mechanical parts, minimal calibration needed\n\nHigh Accuracy – ±0.5 mm liquid level detection\n\nWide Temperature Range – −25 °C to 105 °C operating range\n\nCorrosion Resistant – Polycarbonate (PC) construction\n\nGravity Interface – Plug-and-play with Arduino Gravity shields\n\n3.3 V / 5 V Compatible – Works with Arduino, Raspberry Pi, and other boards\n\nLong Life – Rated for 50 000 hours\n\n\nSpecifications\n\n\nModel – FS-IR02\n\nOperating Voltage – 5 V DC (also works at 3.3 V)\n\nOutput Current – 12 mA\n\nLow Level Output – < 0.1 V\n\nHigh Level Output – > 4.6 V\n\nDetection Accuracy – ±0.5 mm\n\nDimensions – 28 × 28 mm\n\nCable Length – 450 mm\n\nWeight – 26 g\n\n\nIdeal For\n\nWater level monitoring in tanks and reservoirs\nOverflow and dry-run protection systems\nAquaponics and hydroponics automation\nArduino and Raspberry Pi liquid sensing projects\n\n\nPackage Contents\n\n1× FS-IR02 Liquid Level Sensor Probe\n1× Gravity Interface Convert Board\n\n\n\nNote: Avoid placing the sensor near bright lights or in direct sunlight, as these can cause interference with the photoelectric detection.\n\n\nResources\n\nDFRobot Wiki – FS-IR02 Liquid Level Sensor\n","vendor":"DFRobot","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":13427,"title":"Default Title","sku":"DF-SEN0205","price":12.19,"on_sale":false,"in_stock":true,"available_quantity":336,"option1":"Default Title"}]}