{"product_id":"milwaukee-mc811us-max-ph-ec-temperature-continuous-monitor","title":"Milwaukee MC811US MAX pH\/EC\/Temperature Continuous Monitor","description":"\u003cp class=\"PDq2pG_selectionAnchorContainer\"\u003eKeep three important water parameters visible \u003cstrong\u003e24 hours a day, 7 days a week\u003c\/strong\u003e with the \u003cstrong\u003eMilwaukee MC811US MAX pH\/EC\/Temperature Monitor\u003c\/strong\u003e.\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for continuous monitoring, the MC811US simultaneously displays \u003cstrong\u003epH, electrical conductivity (EC), and temperature\u003c\/strong\u003e across three large backlit digital displays. Once installed and calibrated, you can see current readings at a glance without repeatedly pulling out individual handheld meters.\u003c\/p\u003e\n\u003cp\u003eFor aquarium use, it provides a convenient way to continuously monitor \u003cstrong\u003epH and temperature alongside conductivity\u003c\/strong\u003e, while also being suitable for aquaculture, hydroponics, nutrient reservoirs, and other water-quality applications. Milwaukee specifically lists aquariums among the MC811's common uses. \u003cspan class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eThree Parameters. One Monitor.\u003c\/h2\u003e\n\u003cp\u003eInstead of using separate instruments for each measurement, the MC811US combines three monitoring functions into a single compact unit.\u003c\/p\u003e\n\u003ch3\u003eContinuous pH Monitoring\u003c\/h3\u003e\n\u003cp\u003eThe included laboratory-grade \u003cstrong\u003eMA911B\/2 double-junction pH electrode\u003c\/strong\u003e continuously measures pH and connects to the monitor using a BNC connection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRange:\u003c\/strong\u003e 0.0–12.0 pH\u003cbr\u003e\u003cstrong\u003eResolution:\u003c\/strong\u003e 0.1 pH\u003cbr\u003e\u003cstrong\u003eAccuracy:\u003c\/strong\u003e ±0.2 pH\u003cbr\u003e\u003cstrong\u003eCalibration:\u003c\/strong\u003e Manual 2-point calibration\u003c\/p\u003e\n\u003ch3\u003eElectrical Conductivity Monitoring\u003c\/h3\u003e\n\u003cp\u003eThe MC811US continuously measures \u003cstrong\u003eelectrical conductivity (EC)\u003c\/strong\u003e using its included fixed MA812 probe.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRange:\u003c\/strong\u003e 0.00–5.00 mS\/cm\u003cbr\u003e\u003cstrong\u003eResolution:\u003c\/strong\u003e 0.01 mS\/cm\u003cbr\u003e\u003cstrong\u003eAccuracy:\u003c\/strong\u003e ±2% Full Scale\u003cbr\u003e\u003cstrong\u003eCalibration:\u003c\/strong\u003e Manual 1-point calibration\u003c\/p\u003e\n\u003ch3\u003eTemperature Monitoring\u003c\/h3\u003e\n\u003cp\u003eA dedicated stainless-steel temperature probe provides continuous temperature measurement.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRange:\u003c\/strong\u003e 14.0–140.0°F \/ -10.0–60.0°C\u003cbr\u003e\u003cstrong\u003eResolution:\u003c\/strong\u003e 0.1°F \/ 0.1°C\u003cbr\u003e\u003cstrong\u003eAccuracy:\u003c\/strong\u003e ±0.5°F \/ ±0.3°C\u003c\/p\u003e\n\u003cp\u003eTemperature is factory calibrated, and the unit provides automatic temperature compensation from 41–122°F \/ 5–50°C for EC measurements. \u003cspan class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eLarge Backlit Displays\u003c\/h2\u003e\n\u003cp\u003eAll three parameters are displayed \u003cstrong\u003esimultaneously\u003c\/strong\u003e on dedicated backlit LCD readouts, making it easy to check system conditions at a glance.\u003c\/p\u003e\n\u003cp\u003eThat's especially convenient for systems where you want ongoing visibility instead of performing individual spot tests throughout the day.\u003c\/p\u003e\n\u003ch2\u003eDesigned for Continuous Monitoring\u003c\/h2\u003e\n\u003cp\u003eOnce the probes are positioned and the instrument is calibrated, the MC811US is designed to remain in operation for \u003cstrong\u003econtinuous 24\/7 monitoring\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe compact monitor can be mounted above the system being tested or placed on a nearby flat surface, and its approximately \u003cstrong\u003e6.5-foot probe cables\u003c\/strong\u003e provide flexibility when positioning the display and probes. \u003cspan class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eIdeal For\u003c\/h2\u003e\n\u003cp\u003eThe MC811US is suitable for applications including \u003cstrong\u003eaquariums, aquaculture systems, hydroponics, nutrient reservoirs and other systems requiring ongoing water-quality monitoring\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eFor marine aquarium owners, it's important to note that \u003cstrong\u003eEC is a conductivity measurement and should not be presented as a direct replacement for a seawater salinity or specific-gravity instrument\u003c\/strong\u003e such as the Milwaukee MA887.\u003c\/p\u003e\n\u003ch2\u003eIncluded Equipment\u003c\/h2\u003e\n\u003cp\u003eThe MC811US includes the \u003cstrong\u003eMA911B\/2 pH electrode, fixed MA812 EC probe, fixed stainless-steel temperature probe, two probe mounting kits and 12V DC power adapter\u003c\/strong\u003e. \u003cspan class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eAdditional Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e MC811US\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e 6.3 × 4.3 × 1.4 inches\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e Approximately 1.2 lb\u003cbr\u003e\u003cstrong\u003ePower:\u003c\/strong\u003e Included 12V DC adapter\u003cbr\u003e\u003cstrong\u003epH Calibration:\u003c\/strong\u003e Manual, 2 point\u003cbr\u003e\u003cstrong\u003eEC Calibration:\u003c\/strong\u003e Manual, 1 point\u003cbr\u003e\u003cstrong\u003eTemperature Calibration:\u003c\/strong\u003e Factory calibrated\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"\"\u003e\u003ca class=\"decorated-link\" rel=\"noopener\" href=\"https:\/\/milwaukeeinstruments.com\/milwaukee-mc811us-max-ph\/ec\/temp-monitor\/?utm_source=chatgpt.com\" target=\"_blank\"\u003eMilwaukee MC811US specifications and instructions\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eProbe Care \u0026amp; Calibration\u003c\/h2\u003e\n\u003cp\u003eProper probe maintenance is essential for reliable long-term monitoring.\u003c\/p\u003e\n\u003cp\u003eThe pH electrode should remain hydrated and should \u003cstrong\u003enever be stored in distilled, DI, or RO water\u003c\/strong\u003e. Milwaukee recommends appropriate electrode storage solution for long-term storage and periodic cleaning and calibration as the probe ages. \u003cspan class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eEC calibration should also be performed according to Milwaukee's instructions using the appropriate calibration solution.\u003c\/p\u003e\n\u003ch2\u003eMonitor vs. Controller\u003c\/h2\u003e\n\u003cp\u003eThe MC811US is designed for \u003cstrong\u003econtinuous monitoring\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eIt displays your current pH, EC and temperature readings but should not be confused with Milwaukee's controller products that can automatically switch external equipment or activate dosing systems.\u003c\/p\u003e\n\u003cp\u003eFor aquarists who want to \u003cstrong\u003esee their parameters continuously without building out a larger aquarium controller system\u003c\/strong\u003e, that's exactly where the MC811US fits.\u003c\/p\u003e\n\u003ch2\u003eWhy Buy From Infinity and Beyond Aquatics?\u003c\/h2\u003e\n\u003cp\u003eInfinity and Beyond Aquatics carries monitoring and testing equipment for aquarists who want a clearer picture of what's happening inside their systems.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eMilwaukee MC811US MAX\u003c\/strong\u003e combines three continuously displayed measurements with dedicated probes and straightforward operation, making it a powerful monitoring option for serious aquarium and water-quality applications.\u003c\/p\u003e","brand":"SWA","offers":[{"title":"Default Title","offer_id":53235058377013,"sku":"mill-temp-ph-controller","price":309.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0964\/2252\/7285\/files\/MC811_Front_Probes__52599.1648234359__72496.jpg?v=1785464866","url":"https:\/\/infinityandbeyondaquatics.com\/products\/milwaukee-mc811us-max-ph-ec-temperature-continuous-monitor","provider":"Infinity and Beyond Aquatics ","version":"1.0","type":"link"}