{"product_id":"milwaukee-ma812-2-ec-tds-replacement-probe-2m-cable","title":"Milwaukee MA812\/2 EC\/TDS Replacement Probe with 2 m Cable","description":"\u003cdiv style=\"font-family:'Open Sans',Arial,sans-serif;color:#282828;font-size:16px;line-height:1.6;overflow-wrap:anywhere;\"\u003e\n\u003ch2 style=\"color:#245B45;font-size:22px;line-height:1.25;margin:28px 0 12px;\"\u003eA service replacement for your existing EC\/TDS system\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eKeep the instrument you already use and replace its sensing component with the correct part. The \u003cstrong\u003eMilwaukee MA812\/2\u003c\/strong\u003e conductivity\/TDS probe has a \u003cstrong\u003e2 m cable\u003c\/strong\u003e and is specified for the \u003cstrong\u003eMC310 EC monitor, MC410 TDS monitor and MC311 EC controller\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv style=\"background:#F1F7F3;border:1px solid #B7D0BF;border-radius:8px;padding:18px 20px;margin:18px 0;\"\u003e\n\u003cstrong style=\"color:#245B45;\"\u003ePlan this as a service job, not a plug-and-play swap.\u003c\/strong\u003e\u003cp style=\"margin:8px 0 0;\"\u003eThe probe is hardwired. Milwaukee reserves replacement for technical personnel, so confirm your instrument model and arrange qualified service before installation. The MA812\/2 is not a generic DIN or BNC conductivity accessory.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cfigure style=\"margin:24px 0;padding:20px;background:#fff;border:1px solid #e0e0e0;border-radius:8px;text-align:center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/MA812_2-0.webp?v=1794422200\" alt=\"Milwaukee MA812\/2 replacement probe body, official catalog detail; cable not shown\" style=\"display:block;width:100%;max-width:741px;height:auto;margin:0 auto;\" loading=\"lazy\"\u003e\u003cfigcaption style=\"font-size:13px;color:#555;line-height:1.4;margin-top:14px;\"\u003eOfficial catalog probe-body detail. The 2 m cable and hardwired termination are not shown; this is not a photograph of the complete replacement assembly.\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003ch2 style=\"color:#245B45;font-size:22px;line-height:1.25;margin:28px 0 12px;\"\u003eCheck fit and scope before ordering\u003c\/h2\u003e\n\u003cul style=\"padding-left:22px;margin:0 0 18px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eMatch the full part number:\u003c\/strong\u003e MA812\/2 for MC310, MC410 or MC311. Do not select by a similar probe name alone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded component:\u003c\/strong\u003e conductivity\/TDS probe with 2 m cable. The host instrument, mounting kit and calibration solutions are separate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeep the host specifications:\u003c\/strong\u003e this replacement does not add a display, controller or new measurement range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color:#245B45;font-size:22px;line-height:1.25;margin:28px 0 12px;\"\u003ePrepare for calibrated operation after service\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eHave the correct calibration standard ready for commissioning: \u003cstrong\u003e1413 µS\/cm for MC310 and MC311\u003c\/strong\u003e, or \u003cstrong\u003e1500 ppm for MC410\u003c\/strong\u003e. Follow the host instrument's calibration procedure after the probe is changed, then recalibrate at least monthly.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eFor measurement, the operating instructions specify immersing the tip \u003cstrong\u003e4 cm\u003c\/strong\u003e into the sample and waiting for thermal equilibrium. During calibration, keep the metal sensing pins fully submerged in the standard and allow the reading to stabilize before adjustment.\u003c\/p\u003e\n\u003ch2 style=\"color:#245B45;font-size:22px;line-height:1.25;margin:28px 0 12px;\"\u003eUseful additions to the workflow\u003c\/h2\u003e\n\u003cdiv style=\"border-top:1px solid #B7D0BF;padding-top:16px;\"\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong\u003eCompatible accessory:\u003c\/strong\u003e \u003ca href=\"\/products\/milwaukee-m10031b-1413-us-cm-conductivity-calibration-solution-sachets-25\" style=\"color:#245B45;text-decoration:underline;\"\u003eMilwaukee M10031B 1413 µS\/cm calibration solution sachets (25)\u003c\/a\u003e. A practical calibration supply for MC310 and MC311 after probe replacement. For MC410, use the specified 1500 ppm TDS standard instead.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong\u003eRelated workflow:\u003c\/strong\u003e \u003ca href=\"\/products\/milwaukee-mc311-pro-conductivity-ec-controller\" style=\"color:#245B45;text-decoration:underline;\"\u003eMilwaukee MC311 PRO Conductivity (EC) Controller\u003c\/a\u003e. Consider the complete controller when you need an EC control system rather than a replacement sensing component. The MA812\/2 is its specified service probe; the controller is sold separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"color:#245B45;font-size:22px;line-height:1.25;margin:28px 0 12px;\"\u003eMA812\/2 buying and service questions\u003c\/h2\u003e\n\u003cdetails style=\"border:1px solid #e0e0e0;border-radius:8px;margin:0 0 10px;background:#fff;line-height:1.15;\"\u003e\u003csummary style=\"padding:15px 16px;font-weight:600;cursor:pointer;line-height:1.15;\"\u003eWhich instruments accept the MA812\/2?\u003c\/summary\u003e\u003cdiv style=\"padding:0 16px 16px;line-height:1.15;\"\u003eThe MA812\/2 is specified for the Milwaukee MC310 EC monitor, MC410 TDS monitor and MC311 EC controller. Match the complete part number and instrument model before ordering; a similar MA812 model name alone is not a compatibility check.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e0e0e0;border-radius:8px;margin:0 0 10px;background:#fff;line-height:1.15;\"\u003e\u003csummary style=\"padding:15px 16px;font-weight:600;cursor:pointer;line-height:1.15;\"\u003eDoes it have a plug-in DIN or BNC connector?\u003c\/summary\u003e\u003cdiv style=\"padding:0 16px 16px;line-height:1.15;\"\u003eNo. Milwaukee identifies the MA812\/2 as a hardwired probe. Treat it as a service replacement, not a user-swappable DIN or BNC accessory.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e0e0e0;border-radius:8px;margin:0 0 10px;background:#fff;line-height:1.15;\"\u003e\u003csummary style=\"padding:15px 16px;font-weight:600;cursor:pointer;line-height:1.15;\"\u003eWho should install the replacement probe?\u003c\/summary\u003e\u003cdiv style=\"padding:0 16px 16px;line-height:1.15;\"\u003eMilwaukee specifies replacement by technical personnel only. Arrange qualified service before installation. The linked MC310 operating instructions are a related instrument manual, not a standalone MA812\/2 installation guide.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e0e0e0;border-radius:8px;margin:0 0 10px;background:#fff;line-height:1.15;\"\u003e\u003csummary style=\"padding:15px 16px;font-weight:600;cursor:pointer;line-height:1.15;\"\u003eWhat is supplied, and how long is the cable?\u003c\/summary\u003e\u003cdiv style=\"padding:0 16px 16px;line-height:1.15;\"\u003eThis item is the MA812\/2 conductivity\/TDS probe with a 2 m cable. The monitor or controller, mounting kit and calibration solutions are not included. The catalog photograph shows the probe body detail only; the cable is not shown.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e0e0e0;border-radius:8px;margin:0 0 10px;background:#fff;line-height:1.15;\"\u003e\u003csummary style=\"padding:15px 16px;font-weight:600;cursor:pointer;line-height:1.15;\"\u003eWhen should I recalibrate?\u003c\/summary\u003e\u003cdiv style=\"padding:0 16px 16px;line-height:1.15;\"\u003eRecalibrate the host instrument when the probe is changed and at least once a month thereafter, following its operating instructions. Replacement does not remove the need for routine calibration.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e0e0e0;border-radius:8px;margin:0 0 10px;background:#fff;line-height:1.15;\"\u003e\u003csummary style=\"padding:15px 16px;font-weight:600;cursor:pointer;line-height:1.15;\"\u003eWhich calibration standard do I need?\u003c\/summary\u003e\u003cdiv style=\"padding:0 16px 16px;line-height:1.15;\"\u003eUse 1413 µS\/cm conductivity standard for the MC310 or MC311. The MC410 uses 1500 ppm TDS standard. Select the standard for the host model rather than treating EC and TDS calibration solutions as interchangeable.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e0e0e0;border-radius:8px;margin:0 0 10px;background:#fff;line-height:1.15;\"\u003e\u003csummary style=\"padding:15px 16px;font-weight:600;cursor:pointer;line-height:1.15;\"\u003eHow far should the probe enter the sample?\u003c\/summary\u003e\u003cdiv style=\"padding:0 16px 16px;line-height:1.15;\"\u003eThe operating instructions specify immersing the probe tip 4 cm into the sample and waiting for thermal equilibrium. During calibration, make sure the metal sensing pins are completely submerged in the correct standard.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e0e0e0;border-radius:8px;margin:0 0 10px;background:#fff;line-height:1.15;\"\u003e\u003csummary style=\"padding:15px 16px;font-weight:600;cursor:pointer;line-height:1.15;\"\u003eDoes the probe measure independently or change the instrument range?\u003c\/summary\u003e\u003cdiv style=\"padding:0 16px 16px;line-height:1.15;\"\u003eNo. The MA812\/2 is the sensing component for its compatible monitor or controller, not a standalone meter. Readout, measurement range and calibration procedure belong to the host instrument; this replacement is not a range upgrade.\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Milwaukee Instruments","offers":[{"title":"Default Title","offer_id":53532133490986,"sku":"BTS-MA812\/2","price":88.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0896\/1579\/4474\/files\/MA812_2-0.webp?v=1794422200","url":"https:\/\/bluetigerscientific.com\/products\/milwaukee-ma812-2-ec-tds-replacement-probe-2m-cable","provider":"Blue Tiger Scientific","version":"1.0","type":"link"}