{"product_id":"non-contact-capacitive-water-level-sensor-3v-5v","title":"Non-Contact Capacitive Water Level Sensor 3.3V–5V","description":"\n\u003ch2\u003eNon-Contact Capacitive Liquid Level Sensor\u003c\/h2\u003e\n\u003cp\u003eMonitor water and liquid levels effortlessly — no drilling, no direct contact, no leaks. This compact \u003cstrong\u003ecapacitive liquid level sensor\u003c\/strong\u003e detects liquid presence through the wall of a plastic container, making it ideal for DIY electronics projects, smart appliances, and automated liquid management systems. Receive a low-water or full-water alert without ever exposing electronics to moisture.\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 tank walls — no electrodes submerged in liquid.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Voltage Compatibility:\u003c\/strong\u003e Operates at 3.3V–5V, compatible with Arduino, Raspberry Pi, ESP32, and most microcontrollers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Alert Mode:\u003c\/strong\u003e Triggers both low-water and full-water reminders for smart monitoring.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSimple 3-Wire Connection:\u003c\/strong\u003e Red = positive, Black = negative, Yellow = signal — plug-and-play wiring.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlastic Housing:\u003c\/strong\u003e Lightweight, durable, and designed for use in dry environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Applications:\u003c\/strong\u003e Perfect for hand sanitizer dispensers, water dispensers, aroma diffusers, humidifiers, aquariums, and custom automation projects.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSheathed Wire:\u003c\/strong\u003e Neat, protected wiring for clean, secure installations.\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:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e3.3V – 5V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eDetection Method\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003eCapacitive (Non-Contact)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eWire Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003eSheathed Wire (Red \/ Black \/ Yellow)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003ePlastic\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eCompatible Tanks\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003ePlastic water tanks (non-metallic)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003ePackage Contents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; 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:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003eMade in 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\u003eSensor must be placed in close contact with the \u003cstrong\u003eouter wall of a plastic tank\u003c\/strong\u003e — it cannot detect liquid through metal containers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNot suitable\u003c\/strong\u003e for detecting pure alcohol or gasoline.\u003c\/li\u003e\n  \u003cli\u003eUse only in a \u003cstrong\u003edry environment\u003c\/strong\u003e — avoid direct exposure to water.\u003c\/li\u003e\n  \u003cli\u003eAvoid use in \u003cstrong\u003ehigh-temperature environments\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003eDue to manual measurement, please allow a dimensional tolerance of 1–3 mm.\u003c\/li\u003e\n  \u003cli\u003eActual product color may vary slightly from images due to monitor display differences.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What containers is this capacitive liquid level sensor compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: This non-contact water level sensor is designed to work with \u003cstrong\u003eplastic containers and tanks\u003c\/strong\u003e. The capacitive sensing technology detects liquid through the plastic wall without needing direct contact. It is not compatible with metal containers or glass tanks.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can this sensor detect any type of liquid?\u003c\/h4\u003e\n\u003cp\u003eA: This capacitive liquid level sensor works well with water-based liquids such as water, sanitizer solutions, and similar fluids. It is \u003cstrong\u003enot able to detect pure alcohol or gasoline\u003c\/strong\u003e. Always ensure the sensor is used with compatible liquids for accurate readings.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I wire this sensor to an Arduino or Raspberry Pi?\u003c\/h4\u003e\n\u003cp\u003eA: Wiring is straightforward with 3 color-coded wires: \u003cstrong\u003eRed = VCC (positive, 3.3V–5V)\u003c\/strong\u003e, \u003cstrong\u003eBlack = GND (negative)\u003c\/strong\u003e, and \u003cstrong\u003eYellow = Signal output\u003c\/strong\u003e. Connect these to the corresponding pins on your microcontroller board. The signal wire will output a HIGH or LOW state depending on whether liquid is detected at the sensor's position.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does this water level sensor need to be submerged in the liquid?\u003c\/h4\u003e\n\u003cp\u003eA: No — that is one of its biggest advantages. This is a \u003cstrong\u003enon-contact sensor\u003c\/strong\u003e, meaning it attaches to the outside of your tank and detects liquid levels through the container wall. There is no need to submerge any part of the sensor, keeping your electronics completely safe from moisture.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What containers is this capacitive liquid level sensor compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This non-contact water level sensor is designed to work with plastic containers and tanks. The capacitive sensing technology detects liquid through the plastic wall without needing direct contact. It is not compatible with metal containers or glass tanks.\"}}, {\"@type\": \"Question\", \"name\": \"Can this sensor detect any type of liquid?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This capacitive liquid level sensor works well with water-based liquids such as water, sanitizer solutions, and similar fluids. It is not able to detect pure alcohol or gasoline. Always ensure the sensor is used with compatible liquids for accurate readings.\"}}, {\"@type\": \"Question\", \"name\": \"How do I wire this sensor to an Arduino or Raspberry Pi?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Wiring is straightforward with 3 color-coded wires: Red = VCC (positive, 3.3V–5V), Black = GND (negative), and Yellow = Signal output. Connect these to the corresponding pins on your microcontroller board. 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