{"product_id":"online-ph-controller-oph11-4-20ma-output-rs485-communication","title":"Online pH Controller OPH11 (4–20mA Output, RS485 Communication)","description":"\u003cp data-start=\"275\" data-end=\"565\"\u003eOnline pH Controller OPH11 is designed for continuous pH monitoring and process control in industrial, environmental, and water treatment applications. The controller combines accurate pH measurement with reliable signal output and communication capability for real-time monitoring systems.\u003c\/p\u003e\n\u003cp data-start=\"567\" data-end=\"899\"\u003eThe instrument supports pH, mV, and temperature measurement with automatic temperature compensation to ensure stable and accurate readings across varying process conditions. It offers 1 to 3-point calibration with auto-buffer recognition using USA and NIST buffer standards for simplified setup and reliable calibration performance.\u003c\/p\u003e\n\u003cp data-start=\"901\" data-end=\"1175\"\u003eOPH11 includes a built-in electrode diagnosis function that helps users evaluate sensor condition and determine when probe replacement is required. Adjustable alarm settings and hysteresis control improve operational safety and process management in industrial environments.\u003c\/p\u003e\n\u003cp data-start=\"1177\" data-end=\"1426\"\u003eThe controller provides 4–20mA analog signal output and RS485 communication interface for integration with PLC systems, SCADA platforms, and industrial automation networks. Detachable screw terminal connections simplify installation and maintenance.\u003c\/p\u003e\n\u003cp data-start=\"1428\" data-end=\"1632\"\u003eIts compact panel-mount design with LCD display allows easy operation and continuous monitoring in laboratories, water treatment systems, chemical plants, aquaculture, and industrial process applications.\u003c\/p\u003e\n\u003ch3 data-start=\"1634\" data-end=\"1649\"\u003eKey Features\u003c\/h3\u003e\n\u003cp data-start=\"1651\" data-end=\"2116\"\u003eContinuous online pH monitoring and control\u003cbr data-start=\"1694\" data-end=\"1697\"\u003epH, mV, and temperature measurement\u003cbr data-start=\"1732\" data-end=\"1735\"\u003e1 to 3-point calibration with auto-buffer recognition\u003cbr data-start=\"1788\" data-end=\"1791\"\u003eSupports USA and NIST buffer standards\u003cbr data-start=\"1829\" data-end=\"1832\"\u003eAutomatic temperature compensation\u003cbr data-start=\"1866\" data-end=\"1869\"\u003eElectrode diagnosis function\u003cbr data-start=\"1897\" data-end=\"1900\"\u003e4–20mA analog signal output\u003cbr data-start=\"1927\" data-end=\"1930\"\u003eRS485 communication interface\u003cbr data-start=\"1959\" data-end=\"1962\"\u003eConfigurable low and high alarm settings\u003cbr data-start=\"2002\" data-end=\"2005\"\u003eDetachable screw terminal connections\u003cbr data-start=\"2042\" data-end=\"2045\"\u003eCompact panel-mount design\u003cbr data-start=\"2071\" data-end=\"2074\"\u003eSuitable for industrial automation systems\u003c\/p\u003e\n\u003ch3 data-start=\"2118\" data-end=\"2145\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"2147\" data-end=\"2956\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"2147\" data-end=\"2176\"\u003e\n\u003ctr data-start=\"2147\" data-end=\"2176\"\u003e\n\u003cth data-start=\"2147\" data-end=\"2159\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eParameter\u003c\/th\u003e\n\u003cth data-start=\"2159\" data-end=\"2176\" data-col-size=\"md\" class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"2191\" data-end=\"2956\"\u003e\n\u003ctr data-start=\"2191\" data-end=\"2223\"\u003e\n\u003ctd data-start=\"2191\" data-end=\"2202\" data-col-size=\"sm\"\u003epH Range\u003c\/td\u003e\n\u003ctd data-start=\"2202\" data-end=\"2223\" data-col-size=\"md\"\u003e-1.00 to 15.00 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2224\" data-end=\"2251\"\u003e\n\u003ctd data-start=\"2224\" data-end=\"2240\" data-col-size=\"sm\"\u003epH Resolution\u003c\/td\u003e\n\u003ctd data-start=\"2240\" data-end=\"2251\" data-col-size=\"md\"\u003e0.01 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2252\" data-end=\"2278\"\u003e\n\u003ctd data-start=\"2252\" data-end=\"2266\" data-col-size=\"sm\"\u003epH Accuracy\u003c\/td\u003e\n\u003ctd data-start=\"2266\" data-end=\"2278\" data-col-size=\"md\"\u003e±0.01 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2279\" data-end=\"2317\"\u003e\n\u003ctd data-start=\"2279\" data-end=\"2300\" data-col-size=\"sm\"\u003eCalibration Points\u003c\/td\u003e\n\u003ctd data-start=\"2300\" data-end=\"2317\" data-col-size=\"md\"\u003e1 to 3 Points\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2318\" data-end=\"2388\"\u003e\n\u003ctd data-start=\"2318\" data-end=\"2338\" data-col-size=\"sm\"\u003epH Buffer Options\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"2338\" data-end=\"2388\"\u003eUSA (4.01\/7.00\/10.01) or NIST (4.01\/6.86\/9.18)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2389\" data-end=\"2412\"\u003e\n\u003ctd data-start=\"2389\" data-end=\"2400\" data-col-size=\"sm\"\u003emV Range\u003c\/td\u003e\n\u003ctd data-start=\"2400\" data-end=\"2412\" data-col-size=\"md\"\u003e±1000 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2413\" data-end=\"2437\"\u003e\n\u003ctd data-start=\"2413\" data-end=\"2429\" data-col-size=\"sm\"\u003emV Resolution\u003c\/td\u003e\n\u003ctd data-start=\"2429\" data-end=\"2437\" data-col-size=\"md\"\u003e1 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2438\" data-end=\"2461\"\u003e\n\u003ctd data-start=\"2438\" data-end=\"2452\" data-col-size=\"sm\"\u003emV Accuracy\u003c\/td\u003e\n\u003ctd data-start=\"2452\" data-end=\"2461\" data-col-size=\"md\"\u003e±1 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2462\" data-end=\"2496\"\u003e\n\u003ctd data-start=\"2462\" data-end=\"2482\" data-col-size=\"sm\"\u003eTemperature Range\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"2482\" data-end=\"2496\"\u003e0 to 100°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2497\" data-end=\"2531\"\u003e\n\u003ctd data-start=\"2497\" data-end=\"2522\" data-col-size=\"sm\"\u003eTemperature Resolution\u003c\/td\u003e\n\u003ctd data-start=\"2522\" data-end=\"2531\" data-col-size=\"md\"\u003e0.1°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2532\" data-end=\"2563\"\u003e\n\u003ctd data-start=\"2532\" data-end=\"2555\" data-col-size=\"sm\"\u003eTemperature Accuracy\u003c\/td\u003e\n\u003ctd data-start=\"2555\" data-end=\"2563\" data-col-size=\"md\"\u003e±1°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2564\" data-end=\"2591\"\u003e\n\u003ctd data-start=\"2564\" data-end=\"2580\" data-col-size=\"sm\"\u003eSignal Output\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"2580\" data-end=\"2591\"\u003e4–20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2592\" data-end=\"2644\"\u003e\n\u003ctd data-start=\"2592\" data-end=\"2611\" data-col-size=\"sm\"\u003eLow \/ High Alarm\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"2611\" data-end=\"2644\"\u003e0.00 to 14.00 pH (Selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2645\" data-end=\"2680\"\u003e\n\u003ctd data-start=\"2645\" data-end=\"2671\" data-col-size=\"sm\"\u003eCommunication Interface\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"2671\" data-end=\"2680\"\u003eRS485\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2681\" data-end=\"2734\"\u003e\n\u003ctd data-start=\"2681\" data-end=\"2704\" data-col-size=\"sm\"\u003eConnection Terminals\u003c\/td\u003e\n\u003ctd data-start=\"2704\" data-end=\"2734\" data-col-size=\"md\"\u003eDetachable Screw Terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2735\" data-end=\"2787\"\u003e\n\u003ctd data-start=\"2735\" data-end=\"2762\" data-col-size=\"sm\"\u003eTemperature Compensation\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"2762\" data-end=\"2787\"\u003e0 to 100°C, Automatic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2788\" data-end=\"2868\"\u003e\n\u003ctd data-start=\"2788\" data-end=\"2815\" data-col-size=\"sm\"\u003eEnvironmental Conditions\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"2815\" data-end=\"2868\"\u003eAmbient Temperature \u0026lt;50°C, Relative Humidity \u0026lt;70%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2869\" data-end=\"2894\"\u003e\n\u003ctd data-start=\"2869\" data-end=\"2884\" data-col-size=\"sm\"\u003ePower Supply\u003c\/td\u003e\n\u003ctd data-start=\"2884\" data-end=\"2894\" data-col-size=\"md\"\u003eDC 24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2895\" data-end=\"2938\"\u003e\n\u003ctd data-start=\"2895\" data-end=\"2916\" data-col-size=\"sm\"\u003eDimensions (L×W×H)\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"2916\" data-end=\"2938\"\u003e260 × 200 × 110 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2939\" data-end=\"2956\"\u003e\n\u003ctd data-start=\"2939\" data-end=\"2948\" data-col-size=\"sm\"\u003eWeight\u003c\/td\u003e\n\u003ctd data-start=\"2948\" data-end=\"2956\" data-col-size=\"md\"\u003e1 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 data-start=\"2958\" data-end=\"2973\"\u003eApplications\u003c\/h3\u003e\n\u003cp data-start=\"2975\" data-end=\"3192\"\u003eIndustrial process pH monitoring\u003cbr data-start=\"3007\" data-end=\"3010\"\u003eWater and wastewater treatment plants\u003cbr data-start=\"3047\" data-end=\"3050\"\u003eChemical processing industries\u003cbr data-start=\"3080\" data-end=\"3083\"\u003eAquaculture systems\u003cbr data-start=\"3102\" data-end=\"3105\"\u003eEnvironmental monitoring\u003cbr data-start=\"3129\" data-end=\"3132\"\u003eFood and beverage processing\u003cbr data-start=\"3160\" data-end=\"3163\"\u003eLaboratory automation systems\u003c\/p\u003e","brand":"Labman","offers":[{"title":"Default Title","offer_id":49973069938925,"sku":null,"price":35000.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/5672\/6765\/files\/OPH11.webp?v=1778963470","url":"https:\/\/www.biotronscientific.com\/products\/online-ph-controller-oph11-4-20ma-output-rs485-communication","provider":"BIOTRON","version":"1.0","type":"link"}