{"product_id":"capacitive-liquid-level-sensor-non-contact-water-level-detector-switch-3v-5v","title":"Non-Contact Capacitive Liquid Level Sensor 3.3V–5V + Switch","description":"\n\u003ch2\u003eNon-Contact Capacitive Liquid Level Sensor with Switch Controller\u003c\/h2\u003e\n\u003cp\u003eMonitor water and liquid levels accurately — without any direct contact with the liquid. This compact \u003cstrong\u003ecapacitive liquid level sensor\u003c\/strong\u003e works through plastic tank walls to detect fill levels, triggering alerts when a container runs low or reaches capacity. Ideal for DIY electronics projects, smart appliances, and automated dispensing systems.\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 the outer wall of plastic tanks — no probes submerged, no corrosion risk.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Voltage Compatibility:\u003c\/strong\u003e Operates at 3.3V–5V, making it compatible with Arduino, Raspberry Pi, and most microcontroller platforms.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-In Switch Controller:\u003c\/strong\u003e Integrated switch output for easy low-level or full-level alerts — perfect for water shortage or full-tank reminders.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSheathed Wire Connections:\u003c\/strong\u003e Color-coded for easy wiring — Red (positive), Black (negative), Yellow (signal).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Applications:\u003c\/strong\u003e Suitable for hand sanitizer dispensers, water dispensers, aroma diffusers, aquariums, and more.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUse in Dry Environments:\u003c\/strong\u003e Designed for dry, moderate-temperature environments for optimal performance and longevity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Name\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCapacitive Liquid Level Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWire Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSheathed Wire (Red \/ Black \/ Yellow)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDetection Method\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNon-contact, capacitive through plastic wall\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWater shortage reminder \/ Full water reminder\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Tanks\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePlastic water tanks (does NOT detect pure alcohol or gas)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnvironment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDry, avoid high-temperature conditions\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage Includes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 × Capacitive Liquid Level Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWiring Guide\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e🔴 \u003cstrong\u003eRed Wire\u003c\/strong\u003e — Positive (VCC)\u003c\/li\u003e\n  \u003cli\u003e⚫ \u003cstrong\u003eBlack Wire\u003c\/strong\u003e — Negative (GND)\u003c\/li\u003e\n  \u003cli\u003e🟡 \u003cstrong\u003eYellow Wire\u003c\/strong\u003e — Signal Output\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eThis sensor must be used close to the outside surface of a plastic water tank.\u003c\/li\u003e\n  \u003cli\u003eIt cannot detect pure alcohol or gasoline.\u003c\/li\u003e\n  \u003cli\u003eUse only in dry environments; avoid high temperatures.\u003c\/li\u003e\n  \u003cli\u003eDue to manual measurement, please allow a 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\u003ch3\u003eYou May Also Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/silicone-cable-ties-reusable-cord-organizers-10-pack\"\u003e10-Pack Silicone Cable Ties – Reusable Cord Organizers\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/screw-extractor-drill-bit-set-carbon-steel-double-sided\"\u003eScrew Extractor Drill Bit Set 5 \u0026amp; 6 Pc – Carbon Steel\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/adjustable-label-roll-holder-3d-printed-thermal-printer-stand\"\u003eAdjustable Label Roll Holder – 3D Printed Thermal Printer Stand\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/personal-protective-equipment\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on personal protective equipment\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Can this capacitive liquid level sensor detect any type of liquid?\u003c\/h4\u003e\n\u003cp\u003eA: This sensor is designed to detect water and most water-based liquids through plastic tank walls. It \u003cstrong\u003ecannot detect pure alcohol or gasoline\u003c\/strong\u003e. For best results, use it with standard water tanks or containers used in dispensers and diffusers.\u003c\/p\u003e\n\u003ch4\u003eQ: Does the sensor need to be submerged in the liquid to work?\u003c\/h4\u003e\n\u003cp\u003eA: No — that's one of its biggest advantages! This is a \u003cstrong\u003enon-contact liquid level sensor\u003c\/strong\u003e, meaning it attaches to the outside surface of a plastic tank and detects the liquid level through the wall without any direct contact with the liquid.\u003c\/p\u003e\n\u003ch4\u003eQ: What microcontrollers is this sensor compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: The sensor operates at \u003cstrong\u003e3.3V to 5V\u003c\/strong\u003e, making it compatible with popular platforms such as Arduino, Raspberry Pi, ESP8266, ESP32, and most other standard microcontrollers and development boards.\u003c\/p\u003e\n\u003ch4\u003eQ: How do I wire this sensor correctly?\u003c\/h4\u003e\n\u003cp\u003eA: Wiring is straightforward using the color-coded leads: connect the \u003cstrong\u003eRed wire to VCC (positive)\u003c\/strong\u003e, the \u003cstrong\u003eBlack wire to GND (negative)\u003c\/strong\u003e, and the \u003cstrong\u003eYellow wire to your signal\/input pin\u003c\/strong\u003e on your microcontroller or controller board.\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\": \"Can this capacitive liquid level sensor detect any type of liquid?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This sensor is designed to detect water and most water-based liquids through plastic tank walls. It cannot detect pure alcohol or gasoline. For best results, use it with standard water tanks or containers used in dispensers and diffusers.\"}}, {\"@type\": \"Question\", \"name\": \"Does the sensor need to be submerged in the liquid to work?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No — that's one of its biggest advantages! 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