{"product_id":"capacitive-liquid-level-sensor-non-contact-water-level-detector","title":"Capacitive Liquid Level Sensor 3.3V–5V Non-Contact Detector","description":"\n\u003ch2\u003eNon-Contact Capacitive Liquid Level Sensor with Switch Controller\u003c\/h2\u003e\n\u003cp\u003eNever worry about running out of water or overfilling a tank again. This \u003cstrong\u003eCapacitive Liquid Level Sensor\u003c\/strong\u003e offers reliable, non-contact liquid detection through plastic tank walls — no drilling, no direct liquid exposure. Operating at \u003cstrong\u003e3.3V to 5V\u003c\/strong\u003e, it's a compact, easy-to-wire solution perfect for DIY electronics projects, home appliances, and automation setups.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNon-Contact Detection:\u003c\/strong\u003e Senses liquid levels through plastic walls without touching the liquid — keeps the sensor dry and corrosion-free.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Voltage Compatibility:\u003c\/strong\u003e Works with both 3.3V and 5V systems, compatible with Arduino, Raspberry Pi, and most microcontrollers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Alert Functionality:\u003c\/strong\u003e Supports water-shortage reminders AND full-water reminders via built-in switch controller output.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor-Coded Wiring:\u003c\/strong\u003e Simple 3-wire connection — \u003cspan style=\"color:#cc0000;\"\u003e\u003cstrong\u003eRed = Positive\u003c\/strong\u003e\u003c\/span\u003e, \u003cstrong\u003eBlack = Negative\u003c\/strong\u003e, \u003cspan style=\"color:#cccc00;\"\u003e\u003cstrong\u003eYellow = Signal\u003c\/strong\u003e\u003c\/span\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Applications:\u003c\/strong\u003e Ideal for hand sanitizer machines, water dispensers, aroma diffusers, aquarium setups, coffee makers, and more.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSheathed Wire Construction:\u003c\/strong\u003e Durable sheathed cable for clean and reliable connections in your project.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\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\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e3.3V – 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eDetection Method\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eCapacitive, non-contact (through plastic walls)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eWire Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eSheathed wire (3-wire: Red, Black, Yellow)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eCompatible Liquids\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eWater, most common liquids (NOT pure alcohol or gasoline)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eEnvironment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eDry environment; avoid high temperatures\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003ePackage Contents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e1 × Capacitive Liquid Level Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eImportant Usage Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMust be used in close contact with a plastic water tank wall for accurate detection.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCannot detect\u003c\/strong\u003e pure alcohol or gasoline.\u003c\/li\u003e\n  \u003cli\u003eUse only in dry environments and avoid exposure to high temperatures.\u003c\/li\u003e\n  \u003cli\u003eManual measurement tolerance: ±1–3 mm. Color may vary slightly from images due to monitor settings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eGreat for Makers \u0026amp; DIY Enthusiasts\u003c\/h3\u003e\n\u003cp\u003eWhether you're building a smart home device, automating a water dispenser, or prototyping an IoT project, this liquid level sensor is a plug-and-play solution that saves time and effort. Learn more about safe electronic component usage from the U.S. Consumer Product Safety Commission (CPSC).\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-percent-better-every-day-motivational-canvas-wall-poster-inspirational-quote\"\u003e\"1% Better Every Day\" Motivational Canvas Poster | Wall Art\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/better-days-are-coming-motivational-canvas-wall-art-print\"\u003e\"Better Days Are Coming\" Motivational Canvas Wall Art Print\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Can this capacitive liquid level sensor detect liquids through any material?\u003c\/h4\u003e\n\u003cp\u003eA: This sensor is designed to work through \u003cstrong\u003eplastic tank walls\u003c\/strong\u003e. It may not function correctly through metal, glass, or other non-dielectric materials. For best results, mount it directly against a thin plastic container wall.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this water level detector compatible with Arduino and Raspberry Pi?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The sensor operates at 3.3V–5V, making it fully compatible with \u003cstrong\u003eArduino, Raspberry Pi, ESP8266, ESP32\u003c\/strong\u003e, and virtually any microcontroller or development board that supports standard logic levels.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What liquids can this sensor detect?\u003c\/h4\u003e\n\u003cp\u003eA: This capacitive liquid level sensor works well with \u003cstrong\u003ewater and most common liquids\u003c\/strong\u003e. However, it \u003cstrong\u003ecannot detect pure alcohol or gasoline\u003c\/strong\u003e. It is commonly used in water dispensers, hand sanitizer machines, and aroma diffusers.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I wire the liquid level sensor?\u003c\/h4\u003e\n\u003cp\u003eA: Wiring is simple with the 3-wire color-coded cable: connect the \u003cstrong\u003eRed wire to positive (VCC)\u003c\/strong\u003e, the \u003cstrong\u003eBlack wire to ground (GND)\u003c\/strong\u003e, and the \u003cstrong\u003eYellow wire to your signal\/input pin\u003c\/strong\u003e on your controller board.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Can this capacitive liquid level sensor detect liquids through any material?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This sensor is designed to work through plastic tank walls. It may not function correctly through metal, glass, or other non-dielectric materials. For best results, mount it directly against a thin plastic container wall.\"}}, {\"@type\": \"Question\", \"name\": \"Is this water level detector compatible with Arduino and Raspberry Pi?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! The sensor operates at 3.3V–5V, making it fully compatible with Arduino, Raspberry Pi, ESP8266, ESP32, and virtually any microcontroller or development board that supports standard logic levels.\"}}, {\"@type\": \"Question\", \"name\": \"What liquids can this sensor detect?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This capacitive liquid level sensor works well with water and most common liquids. However, it cannot detect pure alcohol or gasoline. 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