{"product_id":"non-contact-level-sensor-ws-03a-liquid-powder-detection","title":"Non-Contact Level Sensor WS-03A | Liquid \u0026 Powder Detection","description":"\n\u003ch2\u003eHpLive WS-03A Non-Contact Level Sensor — Detect Levels Without Touching the Container\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eHpLive WS-03A Non-Contact Level Detection Sensor\u003c\/strong\u003e lets you monitor liquid, powder, and granular material levels from \u003cem\u003eoutside\u003c\/em\u003e the container — no drilling, no probes, no direct contact required. Simply attach it to the exterior wall of any non-metallic vessel (plastic, glass, ceramic) and it accurately detects the material level inside. Ideal for DIY automation projects, aquariums, water tanks, chemical storage containers, grain bins, and more.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrue Non-Contact Detection:\u003c\/strong\u003e Senses material levels through non-metallic container walls (up to 10 mm sensing distance) — no penetration of the vessel needed.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorks on Liquids, Powders \u0026amp; Granules:\u003c\/strong\u003e Suitable for water, oils, chemicals, fine powders, and granular materials in household and industrial settings.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Voltage Compatibility:\u003c\/strong\u003e Operates on 5 V to 24 V DC, making it easy to integrate with Arduino, Raspberry Pi, PLCs, and other common control systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Output Current:\u003c\/strong\u003e Up to 30 mA output current ensures reliable signal transmission to downstream controllers and relays.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable PVC Construction:\u003c\/strong\u003e Lightweight white PVC housing stands up to everyday handling and typical installation environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy Mounting:\u003c\/strong\u003e Attach externally to any flat, non-metallic surface — no modifications to the container required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWS-03A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePVC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWhite\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupply Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 V – 24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax. Output Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSensing Distance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 10 mm (through non-metallic walls)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDetection Targets\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLiquids, powders, granular materials\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 Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × WS-03A Non-Contact Level Sensor\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\/non-contact-capacitive-water-level-sensor-3v-5v\"\u003eNon-Contact Capacitive Water Level Sensor 3.3V–5V\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/aquarium-suction-cup-clips-tube-heater-holders-5-pack\"\u003e5-Pack Aquarium Suction Cup Clips – Tube \u0026amp; Heater Holders\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/3-wire-180-degree-washing-machine-timer-switch-semi-automatic\"\u003e3-Wire 180° Washing Machine Timer Switch | Semi-Automatic\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: What types of containers work with the WS-03A non-contact level sensor?\u003c\/h4\u003e\n\u003cp\u003eA: The WS-03A is designed to work through \u003cstrong\u003enon-metallic container walls\u003c\/strong\u003e such as plastic, glass, and ceramic. Metal containers will block the sensor's signal, so it is not suitable for use on metal vessels. The container wall thickness should be within the 10 mm sensing range for reliable detection.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can the WS-03A non-contact level sensor be used with an Arduino or Raspberry Pi?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The sensor's wide 5 V–24 V DC supply range and 30 mA output current make it directly compatible with Arduino, Raspberry Pi, and most PLCs or microcontroller development boards. Simply connect the output signal wire to a digital input pin on your controller.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this sensor only for detecting water, or can it detect other materials?\u003c\/h4\u003e\n\u003cp\u003eA: The WS-03A non-contact level sensor is versatile — it can detect \u003cstrong\u003eliquids\u003c\/strong\u003e (water, oils, chemicals), \u003cstrong\u003efine powders\u003c\/strong\u003e, and \u003cstrong\u003egranular materials\u003c\/strong\u003e through the container wall, making it useful in a wide range of household automation and light industrial monitoring applications.\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 types of containers work with the WS-03A non-contact level sensor?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The WS-03A is designed to work through non-metallic container walls such as plastic, glass, and ceramic. Metal containers will block the sensor's signal, so it is not suitable for use on metal vessels. 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