{"product_id":"rs485-industrial-water-quality-residual-chlorine-sensor-df-sen0712","title":"RS485 Industrial Water Quality Residual Chlorine Sensor","description":"\u003cp\u003eAn industrial-grade residual chlorine sensor designed for precise and reliable water quality monitoring. Featuring a highly integrated probe and housing, this lightweight unit delivers an intuitive deployment experience. It accurately measures residual chlorine concentrations—specifically hypochlorous acid and hypochlorite ions—\u003cb\u003eranging from 0 to 10 mg\/L, achieving a high resolution of 0.01 mg\/L and an accuracy of ±5%FS.  \u003c\/b\u003e\u003c\/p\u003e\u003cp style=\"text-align: center; \"\u003e\u003cimg src=\"https:\/\/dfimg.dfrobot.com\/enshop\/image\/data\/SEN0712\/1.png\" alt=\"Overview of Industrial-grade RS485 Industrial Water Quality Residual Chlorine Sensor\" title=\"Overview of Industrial-grade RS485 Industrial Water Quality Residual Chlorine Sensor\"\u003e\u003c\/p\u003e\u003cp\u003eEquipped with an RS485 communication interface and full support for the standard ModBus-RTU protocol, the sensor ensures seamless integration into industrial IoT frameworks. Comprehensive tutorials are available for pairing the device with Arduino development boards and DFRobot LoRaWAN networks, facilitating rapid environment setup and real-time data monitoring.  \u003c\/p\u003e\u003cp style=\"text-align: center; \"\u003e\u003cimg src=\"https:\/\/dfimg.dfrobot.com\/enshop\/image\/data\/SEN0712\/2.png\" alt=\"Overview of Industrial-grade RS485 Industrial Water Quality Residual Chlorine Sensor\" title=\"Overview of Industrial-grade RS485 Industrial Water Quality Residual Chlorine Sensor\"\u003e\u003c\/p\u003e\u003cp\u003eTo ensure immediate operational readiness, every sensor undergoes rigorous factory calibration, completely eliminating the necessity for secondary calibration upon installation. Built for harsh environments, the unit features an IP68 waterproof rating, allowing for prolonged continuous underwater submersion. This makes it a highly effective solution for tap water monitoring, drinking water treatment processes, and swimming pool disinfection systems.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eImportant Maintenance Note: \u003c\/b\u003eThe probe cap is sealed with a protective liquid (3.3mol\/L KCl) to preserve the electrode. Occasional seepage may occur around tightly secured caps, resulting in the formation of white crystals. This is a standard chemical occurrence and does not compromise the lifespan or accuracy of the probe. It is recommended that any crystallized material be carefully brushed or poured back into the protective liquid within the cap.\u003c\/p\u003e\u003ch2\u003eFeatures:\u003c\/h2\u003e\u003cli\u003eFactory-Calibrated: Ready for immediate deployment with no secondary calibration required.\u003c\/li\u003e\u003cli\u003eHigh-Precision Measurement: Range of 0~10 mg\/L with a resolution of 0.01 mg\/L and an accuracy of ±5%FS.\u003c\/li\u003e\u003cli\u003eStandardized Industrial Communication: Built-in RS485 interface fully compatible with the ModBus-RTU protocol.\u003c\/li\u003e\u003cli\u003eRugged Durability: Integrated housing design with an IP68 waterproof rating for continuous submersion.\u003c\/li\u003e\u003ch2\u003eApplications:\u003c\/h2\u003e\u003cli\u003eTap water quality monitoring\u003c\/li\u003e\u003cli\u003eDrinking water treatment and purification\u003c\/li\u003e\u003cli\u003eSwimming pool disinfection and maintenance systems\u003c\/li\u003e\u003cli\u003eSmart agriculture and aquaculture monitoring\u003c\/li\u003e\u003cp style=\"text-align: center; \"\u003e\u003cimg src=\"https:\/\/dfimg.dfrobot.com\/enshop\/image\/data\/SEN0712\/3.png\" alt=\"Applications of RS485 Residual Chlorine Sensor\" title=\"Applications of RS485 Residual Chlorine Sensor\"\u003e\u003c\/p\u003e\u003ch2\u003eSpecification:\u003c\/h2\u003e\u003cli\u003ePower Supply Voltage: 10~30V DC\u003c\/li\u003e\u003cli\u003ePower Consumption: 0.2W\u003c\/li\u003e\u003cli\u003eCommunication Interface: RS485 (Standard ModBus-RTU Protocol)\u003c\/li\u003e\u003cli\u003eMeasurement Range: 0~10mg\/L\u003c\/li\u003e\u003cli\u003eMeasurement Error: ±5%FS\u003c\/li\u003e\u003cli\u003eRepeatability Error: ±0.05mg\/L\u003c\/li\u003e\u003cli\u003eResolution: 0.01mg\/L\u003c\/li\u003e\u003cli\u003eResponse Time: 30S\u003c\/li\u003e\u003cli\u003eOperating Temperature: 0°C~+50°C\u003c\/li\u003e\u003cli\u003eWaterproof Rating: IP68\u003c\/li\u003e\u003cli\u003ePressure Resistance: 0.6MPa\u003c\/li\u003e\u003cli\u003eCable Length: 5m\u003c\/li\u003e\u003cli\u003eHousing Material: Corrosion-resistant Plastic\u003c\/li\u003e\u003ch2\u003eDocuments:\u003c\/h2\u003e\u003cli\u003e\u003ca href=\"https:\/\/wiki.dfrobot.com\/sen0712\/\" target=\"_blank\"\u003eProduct wiki\u003c\/a\u003e\u003c\/li\u003e\u003ch2\u003eProduct Includes:\u003c\/h2\u003e\u003cli\u003eRS485 Water Quality Chlorine Residual Sensor x1\u003c\/li\u003e\u003cli\u003e5m sensor cable x1\u003c\/li\u003e\u003cli\u003eElectrode protective solution 100ml (3.3mol\/L KCl) x1\u003c\/li\u003e\u003cli\u003eBlack protective mesh x1\u003c\/li\u003e\u003cli\u003eCable ties x2\u003c\/li\u003e","brand":"DFRobot","offers":[{"title":"Default Title","offer_id":42388489568338,"sku":"DF-SEN0712","price":553.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/0383\/files\/SEN0712_Main_01.jpg?v=1777691592","url":"https:\/\/www.pakronics.co.nz\/products\/rs485-industrial-water-quality-residual-chlorine-sensor-df-sen0712","provider":"Pakronics®","version":"1.0","type":"link"}