{"product_id":"capacitive-non-contact-water-level-sensor-3-3v-5v-liquid-detector","title":"Non-Contact Capacitive Water Level Sensor 3.3V–5V | Liquid Detector","description":"\u003ch2\u003eCapacitive Non-Contact Liquid Level Sensor – Smart Water Detection\u003c\/h2\u003e\n\u003cp\u003eKeep your appliances running smoothly with the \u003cstrong\u003eHELTC Capacitive Non-Contact Water Level Sensor\u003c\/strong\u003e. This clever little sensor detects liquid levels through plastic tank walls — no drilling, no direct contact with liquid required. Whether you need a low-water alert or a full-tank reminder, this sensor delivers reliable, hands-free monitoring for your home or workshop devices.\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 walls of plastic tanks — no need to penetrate or modify your container.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Voltage Compatibility:\u003c\/strong\u003e Operates on 3.3V to 5V, making it compatible with most microcontrollers and DIY electronics platforms.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Alert Functions:\u003c\/strong\u003e Supports both \u003cem\u003ewater shortage\u003c\/em\u003e and \u003cem\u003efull water\u003c\/em\u003e reminder modes to suit a variety of applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy Wiring:\u003c\/strong\u003e Color-coded sheathed wire for quick, no-confusion installation — \u003cspan style=\"color:#e8a000;\"\u003eYellow\u003c\/span\u003e = signal, \u003cspan style=\"color:#cc0000;\"\u003eRed\u003c\/span\u003e = positive (+), \u003cspan style=\"color:#333333;\"\u003eBlack\u003c\/span\u003e = negative (−).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Applications:\u003c\/strong\u003e Ideal for hand sanitizer dispensers, water dispensers, aroma diffusers, fish tanks, humidifiers, and more.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Lightweight:\u003c\/strong\u003e Easily mounts flush against a plastic water tank for a clean, unobtrusive installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDetection Method\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCapacitive, non-contact\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 (3-wire: Signal, +, −)\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 containers (non-metal)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnvironment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDry environment; avoid high temperatures\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLimitations\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCannot detect pure alcohol or gasoline\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage Contents\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\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAutomatic hand sanitizer machines\u003c\/li\u003e\n  \u003cli\u003eWater dispensers \u0026amp; coolers\u003c\/li\u003e\n  \u003cli\u003eAroma diffusers \u0026amp; humidifiers\u003c\/li\u003e\n  \u003cli\u003eAquarium water level monitoring\u003c\/li\u003e\n  \u003cli\u003eDIY Arduino \/ Raspberry Pi projects\u003c\/li\u003e\n  \u003cli\u003eCoffee machines \u0026amp; water tanks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUsage Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned to work through plastic tank walls — do not submerge the sensor itself.\u003c\/li\u003e\n  \u003cli\u003eUse only in dry environments and avoid exposing to high temperatures.\u003c\/li\u003e\n  \u003cli\u003eNot suitable for detecting pure alcohol or gasoline.\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 calibration differences.\u003c\/li\u003e\n\u003c\/ul\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-art-print\"\u003e\"1% Better Every Day\" Motivational Canvas Wall Art Print\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/everything-is-figureoutable-sage-green-quote-canvas-wall-art\"\u003e\"Everything Is Figureoutable\" Sage Green Quote Canvas Wall Art\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor guidance on safe electronics handling and DIY project best practices, visit the U.S. Consumer Product Safety Commission (CPSC).\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Level_sensor\" target=\"_blank\" rel=\"noopener\"\u003eLevel sensor\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Can this capacitive liquid level sensor detect water through a glass or metal tank wall?\u003c\/h4\u003e\n\u003cp\u003eA: No — this sensor is designed to work through \u003cstrong\u003eplastic tank walls only\u003c\/strong\u003e. Glass and metal surfaces will interfere with the capacitive detection method. For best results, mount the sensor flush against a thin-walled plastic container.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this water level sensor compatible with Arduino or Raspberry Pi?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The sensor operates at 3.3V–5V, making it fully compatible with Arduino, Raspberry Pi, ESP32, and most other popular DIY microcontroller platforms. Simply connect the color-coded wires (signal, positive, negative) to your board and you're ready to go.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What liquids can this sensor detect?\u003c\/h4\u003e\n\u003cp\u003eA: This sensor works reliably with water and most water-based liquids (e.g., liquid soap, diffuser water). It \u003cstrong\u003ecannot detect pure alcohol or gasoline\u003c\/strong\u003e due to their low dielectric properties. It is well-suited for hand sanitizer machines, water dispensers, and aroma diffusers.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does the sensor need to be submerged in the liquid?\u003c\/h4\u003e\n\u003cp\u003eA: No — that's the key advantage of this non-contact design. The sensor attaches to the \u003cem\u003eoutside\u003c\/em\u003e of your plastic tank and detects the liquid level through the wall, keeping the electronics completely dry and protected.\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 water through a glass or metal tank wall?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No — this sensor is designed to work through plastic tank walls only. Glass and metal surfaces will interfere with the capacitive detection method. For best results, mount the sensor flush against a thin-walled plastic container.\"}}, {\"@type\": \"Question\", \"name\": \"Is this water level sensor compatible with Arduino or Raspberry Pi?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! The sensor operates at 3.3V–5V, making it fully compatible with Arduino, Raspberry Pi, ESP32, and most other popular DIY microcontroller platforms. Simply connect the color-coded wires (signal, positive, negative) to your board and you're ready to go.\"}}, {\"@type\": \"Question\", \"name\": \"What liquids can this sensor detect?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This sensor works reliably with water and most water-based liquids (e.g., liquid soap, diffuser water). It cannot detect pure alcohol or gasoline due to their low dielectric properties. It is well-suited for hand sanitizer machines, water dispensers, and aroma diffusers.\"}}, {\"@type\": \"Question\", \"name\": \"Does the sensor need to be submerged in the liquid?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No — that's the key advantage of this non-contact design. The sensor attaches to the outside of your plastic tank and detects the liquid level through the wall, keeping the electronics completely dry and protected.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/vd0uzy-jp.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"DIY \u0026 Maker Boards\", \"item\": \"https:\/\/vd0uzy-jp.myshopify.com\/collections\/diy-maker-boards\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Non-Contact Capacitive Water Level Sensor 3.3V–5V | Liquid Detector\", \"item\": \"https:\/\/vd0uzy-jp.myshopify.com\/products\/capacitive-non-contact-water-level-sensor-3-3v-5v-liquid-detector\"}]}\u003c\/script\u003e","brand":"Peaceful Pleasures Health and Wellness","offers":[{"title":"black","offer_id":53667385934137,"sku":"1005006549666693-black","price":13.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/3689\/5801\/files\/S473799750e8349ccac92fe4cf5848112v.webp?v=1783012556","url":"https:\/\/peacefulpleasureswellness.com\/products\/capacitive-non-contact-water-level-sensor-3-3v-5v-liquid-detector","provider":"Peaceful Pleasures Health and Wellness","version":"1.0","type":"link"}