{"title":"Optomax Digital Liquid Level Sensor","handle":"optomax-digital-liquid-level-sensor","url":"/products/optomax-digital-liquid-level-sensor","description":"The Optomax is an optical liquid level sensor that detects the presence or absence of almost any liquid — oil or water based. Inside the polysulfone housing, an infrared LED and matching phototransistor work together: when dry, the IR light reflects internally back to the sensor; when the tip is immersed in liquid, the light escapes and the output switches.\n\nThe sensor provides a push-pull digital output capable of sinking or sourcing up to 100 mA, allowing it to directly drive small loads like transistors or relays. It operates on 4.5–15.4 V DC and is insensitive to ambient light, foam (when in air), and small bubbles (when in liquid).\n\nKey Features\n\n\nOptical Sensing – No moving parts for reliable, maintenance-free operation\n\nPush-Pull Output – Sinks or sources up to 100 mA for direct load driving\n\nWide Supply Range – 4.5–15.4 V DC with reverse polarity, ESD, and transient protection\n\nChemical Resistant Housing – Polysulfone construction for use with a wide range of fluids\n\nCompact Form Factor – Suitable for space-constrained installations\n\nLeak Detection Capable – Sensitive enough to detect small amounts of liquid when positioned correctly\n\nFast Response – Repeatable switching point with optional output delays for sloshing applications\n\n\nWiring\n\n\nBlue/Black Wire – Ground\n\nRed Wire – Supply voltage (4.5–15.4 V DC)\n\nOutput – Supply voltage when dry, 0 V when wet\n\n\nSpecifications\n\n\nOutput Type – Push-pull, up to 100 mA sink/source\n\nSupply Voltage – 4.5–15.4 V DC\n\nHousing Material – Polysulfone (chemically resistant)\n\nOperating Temperature – −25 °C to 80 °C\n\nDetection – Oil and water-based liquids\n\n\nPackage Contents\n\n1× Optomax digital liquid level sensor\n\n\n\nNote: The sensor is highly sensitive — any liquid on the sensing tip (including droplets) can trigger detection.\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":3027,"title":"Default Title","sku":"AF-3397","price":56.97,"on_sale":false,"in_stock":true,"available_quantity":16,"option1":"Default Title"}]}