{"product_id":"autoaqua-titanium-s2-inline-tds-meter-rodi-monitor","title":"AutoAqua Inline TDS Meter - Titanium S2","description":"\u003cp\u003eAre you tired of big, boxy, hard-to-read TDS meters? So are we! That's why we built the \u003cstrong\u003eAutoAqua Titanium Series TDS meters\u003c\/strong\u003e. They are small, easy-to-use, and have a big bright screen to make checking your TDS fast and easy.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eTitanium S2\u003c\/strong\u003e also has a magnetically coupled controller to make it easy to pick up and stick back on the metal frame of your reverse osmosis system. There is no other TDS meter on the market like it. Browse all our \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/water-testing\"\u003ewater testing kits\u003c\/a\u003e or our complete \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/maintenance-water-care\"\u003emaintenance \u0026amp; water care\u003c\/a\u003e lineup.\u003c\/p\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInline installation\u003c\/strong\u003e — connects directly to your RO\/DI system tubing so you can monitor purity continuously, not just when you remember to test.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnetic mount\u003c\/strong\u003e — the display unit attaches to the metal RO\/DI frame magnetically and pops off in your hand for quick reading.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-probe ready\u003c\/strong\u003e — Titanium S2 monitors both inlet and outlet TDS so you can see exactly how much your DI resin is removing in real time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge bright display\u003c\/strong\u003e — readable at a glance from across the room.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact footprint\u003c\/strong\u003e — fits any RO\/DI setup, even tight under-sink installs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eWhy You Need Inline TDS Monitoring\u003c\/h3\u003e\n\u003cp\u003eRO\/DI water purity is the single most important variable for a healthy reef tank. As DI resin exhausts, TDS creeps up — sometimes within days of a fresh fill. A handheld TDS pen only tells you the water quality at the moment you test; an inline meter shows you the trend so you know exactly when to swap DI resin (target: 0 ppm out, replace at the first sign of creep above 1–2 ppm).\u003c\/p\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin:6px 0 10px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;width:42%;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eAutoAqua\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eTitanium S2 (Digital Inline TDS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e\u003cstrong\u003eProbes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e2 (inlet + outlet)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e\u003cstrong\u003eMount\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eMagnetic — attaches to any metal RO\/DI frame\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e\u003cstrong\u003eDisplay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eLarge digital screen, ppm readout\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e\u003cstrong\u003eUse\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eRO\/DI water systems (freshwater \u0026amp; reef)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eRecommended Pairings\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/icecap-dual-di-filter-canister-ro-di-polishing\"\u003eIceCap Dual DI Filter Canister\u003c\/a\u003e — inline polishing DI for the cleanest possible RO\/DI water\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/icecap-ro-booster-pump-kit\"\u003eIceCap RO Booster Pump Kit\u003c\/a\u003e — improves rejection rate and output speed\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/icecap-4stage-rodi-100gpd\"\u003eIceCap 4-Stage RO\/DI System\u003c\/a\u003e — full RO\/DI builds in 75\/100\/150\/200 GPD\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/water-testing\"\u003eAll water testing kits\u003c\/a\u003e — Ca, Alk, Mg, nitrate, phosphate, and more\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/maintenance-water-care\"\u003eMaintenance \u0026amp; water care supplies\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does TDS actually measure?\u003c\/strong\u003e\u003cbr\u003e\nTDS stands for Total Dissolved Solids — the total concentration of ions in the water expressed in parts per million (ppm). For reef and freshwater tanks, your RO\/DI output should read 0 ppm; tap water typically reads 100–500 ppm.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I install it?\u003c\/strong\u003e\u003cbr\u003e\nThe probes splice into your RO\/DI tubing — one before the DI stage (inlet) and one after (outlet). Most installations take under 10 minutes with standard quick-connect fittings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it accurate enough for reef tanks?\u003c\/strong\u003e\u003cbr\u003e\nYes — the Titanium S2 is accurate to ±2% and is designed specifically for the aquarium hobby. The dual-probe inline readout is more informative than a standalone pen meter for ongoing reef use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should I replace the DI resin?\u003c\/strong\u003e\u003cbr\u003e\nReplace at the first sign of TDS creep on the outlet probe (above 1–2 ppm). Mixed-bed color-changing resin also gives a visual cue, but TDS is the most reliable indicator.\u003c\/p\u003e","brand":"AutoAqua","offers":[{"title":"Default Title","offer_id":48789827387611,"sku":"21190","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/AA21190-2T.png?v=1779215568","url":"https:\/\/squeakysaquatics.com\/products\/autoaqua-titanium-s2-inline-tds-meter-rodi-monitor","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}