{"product_id":"hm-digital-trm-1-triple-inline-tds-meter","title":"HM Digital TRM-1 Triple Inline TDS Meter","description":"\u003cp\u003eThe \u003cstrong\u003eHM Digital TRM-1 Triple Inline TDS Meter\u003c\/strong\u003e is the gauge cluster for your RO\/DI system. Three inline probes read total dissolved solids at three points at once, typically your source water, after the RO membrane, and after the DI stage, so you can see exactly how each stage is performing and know the moment a membrane or DI resin is spent. Running RO\/DI without a TDS meter is guesswork; this one takes the guessing out. It fits any system, including our \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/icecap-4stage-rodi-100gpd\"\u003eIceCap 4-Stage RO\/DI units\u003c\/a\u003e, and pairs with an \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/brs-adjustable-ro-float-valve\"\u003eRO float valve\u003c\/a\u003e for a hands-off water station.\u003c\/p\u003e\n\n\u003ch3 style=\"margin:16px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eWhy Three Readings Matter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSource water.\u003c\/strong\u003e Shows what your tap is starting at and how hard the membrane has to work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAfter the membrane.\u003c\/strong\u003e A rising number here means the RO membrane is wearing out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAfter DI.\u003c\/strong\u003e Anything above 0 ppm means the DI resin is exhausted and needs changing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin:16px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree inline sensors\u003c\/strong\u003e with a single digital display, no more pulling samples with a handheld.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual range, 0 to 9990 ppm.\u003c\/strong\u003e 1 ppm resolution to 999 ppm; 10 ppm resolution above that with an x10 indicator.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory calibrated\u003c\/strong\u003e with a 342 ppm NaCl solution and accurate to within 2 percent.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuto-off\u003c\/strong\u003e after 10 minutes of non-use to save the batteries.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEverything included.\u003c\/strong\u003e Three 1\/4 inch quick-connect tees with double o-rings and two LR44 batteries in the box.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin:16px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eCut the 1\/4 inch line at each point you want to monitor and press the tubing into the included quick-connect tees. Mount the display where you can see it, connect the three sensor leads, and you are done. No calibration needed out of the box.\u003c\/p\u003e\n\n\u003ch3 style=\"margin:16px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;margin:8px 0;font-size:0.95em;\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eBrand \/ model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eHM Digital TRM-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eRange\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e0 to 9990 ppm (dual range)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eResolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e1 ppm to 999 ppm; 10 ppm from 1000 to 9990 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eAccuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003ePlus or minus 2 percent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eConversion factor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eNaCl (avg. 0.5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eSensors\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e3 inline, 24.5 in cable including sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eFittings\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eThree 1\/4 in quick-connect tees, double o-ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e2 x 1.5V LR44 button cells (included); auto-off 10 min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eDisplay size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e3 x 0.8 x 1.9 in (7.6 x 2 x 4.7 cm), 2.8 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eWater type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eFreshwater and saltwater RO\/DI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3 style=\"margin:16px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eRecommended Pairings\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/icecap-4stage-rodi-75gpd\"\u003eIceCap 4-Stage RO\/DI 75 GPD\u003c\/a\u003e, \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/icecap-4stage-rodi-100gpd\"\u003e100 GPD\u003c\/a\u003e, or \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/icecap-4stage-rodi-150gpd\"\u003e150 GPD\u003c\/a\u003e systems\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/brs-adjustable-ro-float-valve\"\u003eAdjustable RO Float Valve\u003c\/a\u003e to stop the fill automatically\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/autoaqua-titanium-s2-inline-tds-meter-rodi-monitor\"\u003eAutoAqua Titanium S2 Inline TDS Meter\u003c\/a\u003e if you only need a single reading\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin:16px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhere do I install the three sensors?\u003c\/strong\u003e The usual setup is source water in, after the RO membrane, and after the DI resin. That shows you the whole system at a glance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat TDS should I see after DI?\u003c\/strong\u003e 0 ppm. Once it starts creeping up, swap the DI resin.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it need calibrating?\u003c\/strong\u003e No. It ships factory calibrated and holds its calibration in normal use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it fit my tubing?\u003c\/strong\u003e It uses standard 1\/4 inch quick-connect tees, which match nearly every home RO\/DI system.\u003c\/p\u003e","brand":"HM Digital","offers":[{"title":"Default Title","offer_id":49274071417051,"sku":"200219","price":46.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/200219-tdsmetertripleinlinetrm-1-b_1.jpg?v=1789052160","url":"https:\/\/squeakysaquatics.com\/products\/hm-digital-trm-1-triple-inline-tds-meter","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}