{"product_id":"rs485-ph-orp-and-temperature-sensor-modbus-rtu-water-quality-monitoring-ph-orp-and-temperature-ss100050803","title":"RS485 pH, ORP and Temperature Sensor: Modbus RTU, Water Quality Monitoring, pH, ORP and Temperature","description":"\u003cp\u003eThe RS485 pH, ORP and Temperature Sensor is a high-precision water quality sensor widely used in water treatment, irrigation, smart agriculture, pipelines, tanks, and environmental monitoring. It simultaneously measures pH, oxidation-reduction potential (ORP), and water temperature. Temperature compensation and configurable signal filtering help maintain stable readings under changing conditions. For easy integration, it supports RS485 Modbus RTU communication and low-power 4.5–28 V DC operation. Moreover, its IP68 design, 3\/4-inch NPT threads, and built-in surge, reverse-polarity, TVS, and ESD protection ensure reliable long-term use.\u003c\/p\u003e\r\n\u003cp\u003eThis sensor is available with an RS485 Modbus RTU interface. It is compatible with the \u003ca href=\"https:\/\/www.seeedstudio.com\/SenseCAP-S2100-LoRaWAN-Data-Logger-p-5361.html\"\u003eSenseCAP S2100 LoRaWAN® Data Logger\u003c\/a\u003e, enabling low-power, long-range data transmission over LoRaWAN® networks.\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003e\n\u003cstrong\u003eIntegrated pH and ORP Monitoring\u003c\/strong\u003e: Measures pH, oxidation-reduction potential (ORP), and temperature in a single device. These parameters provide a more complete understanding of water acidity, chemical balance, and oxidation-reduction conditions for water-quality assessment and process monitoring.\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp\u003e\u003cimg src=\"https:\/\/www.seeedstudio.com\/media\/catalog\/product\/1\/0\/100050803-feature_img_1.png\" alt=\"Integrated pH and ORP Monitoring\"\u003e\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003e\n\u003cstrong\u003eTemperature Compensation and Flexible Calibration\u003c\/strong\u003e: Supports temperature-compensated pH and ORP measurements to reduce the influence of changing water temperature. Multi-point pH calibration and ORP standard-solution calibration help ensure measurement accuracy. Meanwhile, temperature offset adjustment and configurable signal filtering maintain stable readings across different environments.\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp\u003e\u003cimg src=\"https:\/\/www.seeedstudio.com\/media\/catalog\/product\/1\/0\/100050803-feature_img_2.png\" alt=\"Temperature Compensation and Flexible Calibration\"\u003e\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003e\n\u003cstrong\u003eIndustrial RS485 Modbus RTU Communication:\u003c\/strong\u003e Uses the RS485 Modbus RTU interface for reliable long-distance data transmission and connection of multiple sensors on the same communication bus. Configurable device address, baud rate, parity, and data format make integration with industrial controllers, data loggers, and monitoring systems more flexible.\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp\u003e\u003cimg src=\"https:\/\/www.seeedstudio.com\/media\/catalog\/product\/1\/0\/100050803-feature_img_3.png\" alt=\"Industrial RS485 Modbus RTU Communication\"\u003e\u003c\/p\u003e\r\n\u003cul\u003e\r\n\u003cli\u003e\n\u003cstrong\u003eRugged IP68 Installation Design:\u003c\/strong\u003e Features an IP68 enclosure and 3\/4-inch NPT threads for submerged, pipeline, and tank installation. A wide 4.5–28 V DC power range allows for flexible system integration. In addition, built-in surge, reverse-polarity, TVS, and ESD protection improve reliability in water treatment, wastewater monitoring, and smart-agriculture applications.\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp\u003e\u003cimg src=\"https:\/\/www.seeedstudio.com\/media\/catalog\/product\/1\/0\/100050803-feature_img_4.png\" alt=\"Rugged IP68 Installation Design\"\u003e\u003c\/p\u003e\r\n\u003cdiv class=\"tips\"\u003e \u003c\/div\u003e\r\n\u003cdiv class=\"tips\" style=\"display: table; table-layout: fixed; background-color: #d9f5f3; height: auto; width: 100%;\"\u003e\r\n\u003cdiv class=\"left-icon\" style=\"display: table-cell; vertical-align: middle; background-color: #83dfd3; padding-top: 10px; box-sizing: border-box; height: auto; width: 38px; text-align: center;\"\u003e\u003cimg style=\"width: 26px; vertical-align: middle;\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/static.seeed.cc\/seeed\/icon\/Tip.svg\" alt=\"attention icon\"\u003e\u003c\/div\u003e\r\n\u003cdiv class=\"right-desc\" style=\"display: table-cell; vertical-align: middle; padding-left: 15px; box-sizing: border-box; width: calc(95% - 38px);\"\u003e\r\n\u003cp style=\"font-weight: bold; margin-top: 10px;\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e This sensor can also be used in seawater, but its service life may be reduced depending on the salinity of the water.\u003c\/p\u003e\r\n\u003c\/div\u003e\r\n\u003c\/div\u003e\r\n\u003cp\u003e\u003cstrong\u003eRecommendation for S2100 Data Logger\u003c\/strong\u003e\u003c\/p\u003e\r\n\u003cp\u003eSenseCAP S2100 Data Logger can connect to Modbus RS485\/Analog\/GPIO industrial sensors including the \u003ca href=\"https:\/\/www.seeedstudio.com\/compatibility-list.html\"\u003eGrow Your Idea\u003c\/a\u003e and transmit data from sensors to the LoRaWAN network. Benefiting from its high robustness and waterproof and dustproof enclosure, the S2100 data logger can work under harsh environments such as high UV exposure, heavy rain, dusty conditions, etc. which is ideal for outdoor use. Based on LoRaWAN, it can cover a long transmission range of 2km in urban scenes and 10km in line-of-sight while keeping lower power consumption. Equipped with built-in Bluetooth and app service for OTA configuration and remote management, it enables quick setup and update. It can be battery-powered or connected to a 12V external power supply. When the 12V power supply is connected, the replaceable built-in battery is set to be used as the backup power supply.\u003c\/p\u003e\r\n\u003cp\u003e\u003cimg src=\"https:\/\/www.seeedstudio.com\/media\/catalog\/product\/1\/0\/100050803-feature_img_5.png\" alt=\"SenseCAP S2100 Data Logger Recommendation\"\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eAttention:\u003c\/strong\u003e\u003c\/p\u003e\r\n\u003cp\u003eIf you need to connect sensors or an external power supply for the S2100, please refer to the wiring diagram below. Please note that the sensor supply voltage range is 4.5-28 V, while the external power supply for the S2100 must be a stable 12 V supply.\u003c\/p\u003e\r\n\u003cp\u003e\u003cimg src=\"https:\/\/www.seeedstudio.com\/media\/catalog\/product\/1\/0\/100050803-feature_img_6.png\" alt=\"Wiring Diagram\"\u003e\u003c\/p\u003e\r\n\u003cp\u003eSeeed also provides the \u003ca href=\"https:\/\/solution.seeedstudio.com\/product\/software-cloud-sensecap-portal\/\"\u003eSenseCAP Portal\u003c\/a\u003e and \u003ca href=\"https:\/\/solution.seeedstudio.com\/product\/software-cloud-sensecap-app\/\"\u003eSenseCraft\u003c\/a\u003e to help users better manage and check data remotely.\u003c\/p\u003e\r\n\u003cp\u003e\u003cimg src=\"https:\/\/www.seeedstudio.com\/media\/catalog\/product\/1\/0\/100050803-feature_img_7.png\" alt=\"SenseCAP Portal and SenseCraft\"\u003e\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003ctable\u003e\n\u003ccolgroup\u003e\n\u003ccol\u003e\n\u003ccol\u003e\n\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003e\u003cb\u003eGeneral Parameters\u003c\/b\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct model\u003c\/td\u003e\n\u003ctd\u003eS-pH\u0026amp;ORP-01A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput interface\u003c\/td\u003e\n\u003ctd\u003eRS485\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtocol\u003c\/td\u003e\n\u003ctd\u003eModbus RTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDefault serial communication\u003c\/td\u003e\n\u003ctd\u003eSlave address: 1; \u003cbr\u003ebaud rate: 9600 bps; \u003cbr\u003edata bits: 8; \u003cbr\u003estop bits: 1 stop bit;\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower supply\u003c\/td\u003e\n\u003ctd\u003e4.5–28 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower consumption\u003c\/td\u003e\n\u003ctd\u003eQuiescent \u0026lt;8 mA at 12 V DC; \u003cbr\u003emeasuring \u0026lt;10 mA at 12 V DC;\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIP rating\u003c\/td\u003e\n\u003ctd\u003eIP68\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating conditions\u003c\/td\u003e\n\u003ctd\u003e0–80 °C; 0–100% RH; pressure ≤0.2 MPa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage conditions\u003c\/td\u003e\n\u003ctd\u003e−5 to 65 °C; 0–90% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable length\u003c\/td\u003e\n\u003ctd\u003e2 m; \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e207 × 30 mm (length × diameter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMechanical connection\u003c\/td\u003e\n\u003ctd\u003e3\/4-inch NPT threads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\r\n\u003ctable\u003e\n\u003ccolgroup\u003e\n\u003ccol\u003e\n\u003ccol\u003e\n\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003e\u003cb\u003epH Measurement\u003c\/b\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRange\u003c\/td\u003e\n\u003ctd\u003e0.00–14.00 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e0.01 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±0.1 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResponse time\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;10 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003e\u003cb\u003eORP Measurement\u003c\/b\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRange\u003c\/td\u003e\n\u003ctd\u003e−2000.0 to 2000.0 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e0.1 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±20 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResponse time\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;30 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\"\u003e\u003cb\u003eTemperature Measurement\u003c\/b\u003e\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRange\u003c\/td\u003e\n\u003ctd\u003e−40 to 80 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e0.1 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±0.5 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\r\n\u003cp\u003e\u003cstrong\u003eWiring Diagram\u003c\/strong\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cimg src=\"https:\/\/www.seeedstudio.com\/media\/catalog\/product\/1\/0\/100050803-spec_img_1.png\" alt=\"image\"\u003e\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cul\u003e\r\n\u003cli\u003eWater Treatment\u003c\/li\u003e\r\n\u003cli\u003eWastewater Monitoring\u003c\/li\u003e\r\n\u003cli\u003eAquaculture\u003c\/li\u003e\r\n\u003cli\u003eIndustrial Process Monitoring\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp\u003e\u003cimg src=\"https:\/\/www.seeedstudio.com\/media\/catalog\/product\/1\/0\/100050803-application_img_1.png\" alt=\"image\"\u003e\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cdiv data-page-id=\"QVnSdUYfioK4N7xwWoVclDE7nqf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\"\u003e\r\n\u003cdiv class=\"ace-line ace-line old-record-id-F7ypd6QMgo0xq3xU2EXcUTpXnbe\"\u003e\u003ca href=\"https:\/\/files.seeedstudio.com\/products\/100050803\/res\/RS485%20pH,%20ORP%20and%20Temperature%20Sensor%20User%20Manual.pdf\"\u003eDatasheet for RS485 pH, ORP and Temperature Sensor\u003c\/a\u003e\u003c\/div\u003e\r\n\u003c\/div\u003e\u003cbr\u003e\u003cbr\u003e\u003ctable\u003e\u003ctr\u003e\n\u003ctd\u003eRS485 pH, ORP and Temperature Sensor\u003c\/td\u003e\n\u003ctd\u003ex1\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/table\u003e\u003cbr\u003e\u003cbr\u003e\u003cdiv class=\"certification\"\u003e\n    \u003c\/div\u003e\n\n\n\u003ctable class=\"table\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n                  \u003ctd class=\"name\"\u003eHSCODE\u003c\/td\u003e\n                  \u003ctd\u003e9027899090\u003c\/td\u003e\n              \u003c\/tr\u003e\n\u003ctr\u003e\n                  \u003ctd class=\"name\"\u003eUSHSCODE\u003c\/td\u003e\n                  \u003ctd\u003e9027894590\u003c\/td\u003e\n              \u003c\/tr\u003e\n\u003ctr\u003e\n                  \u003ctd class=\"name\"\u003eUPC\u003c\/td\u003e\n                  \u003ctd\u003e \u003c\/td\u003e\n              \u003c\/tr\u003e\n\u003ctr\u003e\n                  \u003ctd class=\"name\"\u003eEUHSCODE\u003c\/td\u003e\n                  \u003ctd\u003e9027109000\u003c\/td\u003e\n              \u003c\/tr\u003e\n\u003ctr\u003e\n                  \u003ctd class=\"name\"\u003eCOO\u003c\/td\u003e\n                  \u003ctd\u003e \u003c\/td\u003e\n              \u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\n\u003ctable class=\"table\"\u003e\u003ctbody\u003e\n    \u003c\/tbody\u003e\u003c\/table\u003e\n\u003cbr\u003e\u003cbr\u003eArray\u003cbr\u003e\u003cbr\u003e","brand":"Seeed Studio","offers":[{"title":"Default Title","offer_id":42659517923410,"sku":"SS100050803","price":417.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/0383\/files\/100050803-gallery_img_2.jpg?v=1788065035","url":"https:\/\/www.pakronics.co.nz\/products\/rs485-ph-orp-and-temperature-sensor-modbus-rtu-water-quality-monitoring-ph-orp-and-temperature-ss100050803","provider":"Pakronics®","version":"1.0","type":"link"}