{"product_id":"seeed-studio-s-yw-01b-rs485-modbus-rtu-liquid-level-sensor","title":"Seeed Studio S-YW-01B | Industrial RS485 Modbus-RTU Liquid Level Sensor","description":"\u003cdiv class=\"shopiot-detailed-description\" style=\"max-width: 800px; font-family: 'DM Sans', sans-serif; color: #2a2b2a; line-height: 1.6; font-size: 16px;\"\u003e\n\u003csection style=\"margin-bottom: 35px;\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eSeeed Studio S-YW-01B\u003c\/strong\u003e is an \u003cstrong\u003eindustrial-grade submersible liquid level sensor\u003c\/strong\u003e measuring liquid height across a \u003cstrong\u003e0 to 5-metre range\u003c\/strong\u003e and transmitting data via the \u003cstrong\u003eRS485 Modbus-RTU protocol\u003c\/strong\u003e. Built around a \u003cstrong\u003ehigh-sensitivity silicon piezoresistive sensing core\u003c\/strong\u003e with a \u003cstrong\u003e304 stainless steel shell and 316L stainless steel wetted core\u003c\/strong\u003e, it is engineered for continuous immersion in water, edible oil, and other mildly corrosive liquids. The sensor is \u003cstrong\u003eIP68-rated\u003c\/strong\u003e and includes a \u003cstrong\u003e5.3-metre waterproof cable\u003c\/strong\u003e with an \u003cstrong\u003eaviation-style connector\u003c\/strong\u003e, making it suitable for deployment in reservoirs, tanks, deep wells, pump stations, and wastewater treatment facilities. It connects directly to any device supporting Modbus-RTU over RS485 — including PLCs, data loggers, recorders, inverters, and SCADA systems — with no proprietary gateway required.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection style=\"margin-bottom: 35px;\"\u003e\n\u003ch3 style=\"color: #7765e3; font-size: 16px; margin-bottom: 18px; font-weight: bold; text-transform: uppercase;\"\u003eCore Capabilities\u003c\/h3\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 15px;\"\u003e\n\u003cdiv style=\"display: flex; gap: 12px; align-items: flex-start; padding: 15px; border-radius: 4px; border: 1px solid #f5f5f5; background: #fff;\"\u003e\n\u003cspan style=\"color: #7765e3;\"\u003e\u003csvg width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003cpolyline points=\"22 12 18 12 15 21 9 3 6 12 2 12\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/span\u003e\n\u003cdiv style=\"font-size: 14px;\"\u003e\n\u003cstrong style=\"display: block; color: #2a2b2a;\"\u003eHigh-Accuracy Piezoresistive Sensing\u003c\/strong\u003e \u003cspan style=\"color: #555;\"\u003eSilicon piezoresistive core delivers ±0.25% F.S. accuracy with a 5 ms response time (≤90% F.S.) and a zero temperature drift of ±0.03% F.S.\/°C, ensuring reliable measurement in fluctuating temperature environments from −10°C to +70°C.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; gap: 12px; align-items: flex-start; padding: 15px; border-radius: 4px; border: 1px solid #f5f5f5; background: #fff;\"\u003e\n\u003cspan style=\"color: #7765e3;\"\u003e\u003csvg width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003cpath d=\"M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\n\u003cdiv style=\"font-size: 14px;\"\u003e\n\u003cstrong style=\"display: block; color: #2a2b2a;\"\u003e316L Stainless Steel \u0026amp; IP68 Construction\u003c\/strong\u003e \u003cspan style=\"color: #555;\"\u003e304 stainless steel outer shell with 316L stainless steel wetted core and special rubber-insulated cable rated from −40°C to +85°C. Anti-corrosion material and anti-blocking design ensure reliable long-term operation in submersed, outdoor, and chemically aggressive environments.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; gap: 12px; align-items: flex-start; padding: 15px; border-radius: 4px; border: 1px solid #f5f5f5; background: #fff;\"\u003e\n\u003cspan style=\"color: #7765e3;\"\u003e\u003csvg width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003ccircle r=\"10\" cy=\"12\" cx=\"12\"\u003e\u003c\/circle\u003e\u003cline y2=\"12\" x2=\"22\" y1=\"12\" x1=\"2\"\u003e\u003c\/line\u003e\u003cpath d=\"M12 2a15.3 15.3 0 0 1 4 10 15.3 15.3 0 0 1-4 10 15.3 15.3 0 0 1-4-10 15.3 15.3 0 0 1 4-10z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/span\u003e\n\u003cdiv style=\"font-size: 14px;\"\u003e\n\u003cstrong style=\"display: block; color: #2a2b2a;\"\u003eUniversal RS485 Modbus-RTU Connectivity\u003c\/strong\u003e \u003cspan style=\"color: #555;\"\u003eOutputs measurement data over RS485 using the Modbus-RTU protocol (Slave address: 0x1A, default baud rate: 9600 bps). Compatible with PLCs, SCADA systems, data loggers, recorders, and inverters. Supports baud rates from 1200 to 115200 bps and a multi-unit output selection including m, cm, mm, Pa, KPa, PSI, mH\u003csub\u003e2\u003c\/sub\u003eO, and more.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; gap: 12px; align-items: flex-start; padding: 15px; border-radius: 4px; border: 1px solid #f5f5f5; background: #fff;\"\u003e\n\u003cspan style=\"color: #7765e3;\"\u003e\u003csvg width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003crect ry=\"2\" rx=\"2\" height=\"18\" width=\"18\" y=\"3\" x=\"3\"\u003e\u003c\/rect\u003e\u003cline y2=\"21\" x2=\"9\" y1=\"3\" x1=\"9\"\u003e\u003c\/line\u003e\u003c\/svg\u003e\u003c\/span\u003e\n\u003cdiv style=\"font-size: 14px;\"\u003e\n\u003cstrong style=\"display: block; color: #2a2b2a;\"\u003e200% Overload Capacity \u0026amp; Long-Term Stability\u003c\/strong\u003e \u003cspan style=\"color: #555;\"\u003eRated for 200% F.S. overload capacity with a long-term stability of ≤0.2% F.S.\/year, ensuring reliable performance in surge conditions such as pump stations and flash flood monitoring without permanent damage to the sensing element.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection style=\"margin-bottom: 35px; background-color: #fafafa; border-left: 4px solid #7765E3; padding: 20px; border-radius: 2px;\"\u003e\n\u003ch3 style=\"color: #7765e3; font-size: 16px; margin-top: 0; margin-bottom: 12px; font-weight: bold; text-transform: uppercase;\"\u003eIndustrial Applications\u003c\/h3\u003e\n\u003cdiv style=\"margin: 0; font-size: 15px;\"\u003e\n\u003cdiv style=\"margin-bottom: 10px; display: flex; align-items: flex-start;\"\u003e\n\u003cspan style=\"color: #7765e3; margin-right: 8px; font-weight: bold;\"\u003e•\u003c\/span\u003e \u003cspan\u003e\u003cstrong\u003eReservoir \u0026amp; Tank Level Monitoring:\u003c\/strong\u003e Continuously measure liquid height in storage tanks, reservoirs, and holding vessels containing water, edible oil, or mildly corrosive liquids, with RS485 data readable directly by SCADA or PLC control systems.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 10px; display: flex; align-items: flex-start;\"\u003e\n\u003cspan style=\"color: #7765e3; margin-right: 8px; font-weight: bold;\"\u003e•\u003c\/span\u003e \u003cspan\u003e\u003cstrong\u003ePump Station \u0026amp; Deep Well Monitoring:\u003c\/strong\u003e Deploy in pump wet wells, high pool pump stations, and deep wells to automate pump control based on real-time level data, preventing dry-running and overflow conditions.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 10px; display: flex; align-items: flex-start;\"\u003e\n\u003cspan style=\"color: #7765e3; margin-right: 8px; font-weight: bold;\"\u003e•\u003c\/span\u003e \u003cspan\u003e\u003cstrong\u003eWastewater Treatment:\u003c\/strong\u003e Monitor level in wastewater collection pits, equalisation tanks, and treatment basins. The 316L stainless steel wetted core and anti-blocking probe design maintain accuracy in solids-laden or chemically active liquids.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 0; display: flex; align-items: flex-start;\"\u003e\n\u003cspan style=\"color: #7765e3; margin-right: 8px; font-weight: bold;\"\u003e•\u003c\/span\u003e \u003cspan\u003e\u003cstrong\u003eRiver, Marine \u0026amp; Dammed Lake Monitoring:\u003c\/strong\u003e Suitable for environmental hydrological monitoring in rivers, marine monitoring stations, and dammed lake systems, where submersion, high-vibration, and impact resistance are required for uninterrupted operation.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection style=\"margin-bottom: 35px;\"\u003e\n\u003ch3 style=\"color: #7765e3; font-size: 16px; margin-bottom: 10px; font-weight: bold; text-transform: uppercase;\"\u003eTechnical Integration\u003c\/h3\u003e\n\u003cp style=\"font-size: 14px; color: #555;\"\u003eThe S-YW-01B communicates via \u003cstrong\u003eRS485 Modbus-RTU\u003c\/strong\u003e (Function Codes 0x03 Read \/ 0x06 Write) with a default slave address of \u003cstrong\u003e0x1A\u003c\/strong\u003e and baud rate of \u003cstrong\u003e9600 bps\u003c\/strong\u003e (configurable from 1200 to 115200 bps). The wiring connector follows a 4-wire colour-coded scheme: Red (VCC+), Green (VCC−), Blue (RS485-A), Yellow (RS485-B), with an additional red air pipe for atmospheric reference. The sensor is also compatible with the \u003cstrong\u003eSeeed SenseCAP Sensor Hub 4G Data Logger\u003c\/strong\u003e for cellular IoT deployments requiring seamless cloud data management. Power supply range is \u003cstrong\u003e11–30V DC\u003c\/strong\u003e. For integration support, PLC configuration templates, or system design assistance, contact the \u003cstrong\u003eShopIoT\u003c\/strong\u003e technical team.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection style=\"margin-bottom: 35px;\"\u003e\n\u003ch3 style=\"color: #7765e3; font-size: 16px; margin-bottom: 14px; font-weight: bold; text-transform: uppercase;\"\u003eCertifications\u003c\/h3\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 10px;\"\u003e\n\u003cdiv style=\"display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; border: 1px solid #e8e4ff; border-radius: 4px; background: #f9f8ff;\"\u003e\n\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#7765e3\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003cpath d=\"M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003cspan style=\"font-size: 13px; font-weight: 600; color: #2a2b2a;\"\u003eCE\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; border: 1px solid #e8e4ff; border-radius: 4px; background: #f9f8ff;\"\u003e\n\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#7765e3\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003cpath d=\"M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003cspan style=\"font-size: 13px; font-weight: 600; color: #2a2b2a;\"\u003eFCC\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; border: 1px solid #e8e4ff; border-radius: 4px; background: #f9f8ff;\"\u003e\n\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#7765e3\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003cpath d=\"M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003cspan style=\"font-size: 13px; font-weight: 600; color: #2a2b2a;\"\u003eRoHS\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e","brand":"Seeed Studio","offers":[{"title":"Default Title","offer_id":56752255664452,"sku":"101990860","price":179.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0418\/3749\/4423\/files\/seeed_studio_s_yw_01b_rs485_modbus_rtu_liquid_level_sensor.webp?v=1778761298","url":"https:\/\/shopiot.eu\/en-de\/products\/seeed-studio-s-yw-01b-rs485-modbus-rtu-liquid-level-sensor","provider":"shopiot","version":"1.0","type":"link"}