The AutoAqua Digital Inline TDS Titanium S2 monitors water quality at two points simultaneously — typically before and after your RO/DI filter — so you can see filtration performance directly instead of guessing from a single reading. Probe: titanium, resists corrosion, two 1/4in push-connect union tees for dual-line installation, magnetic mount Display: backlit LCD, single-button operation Power: CR2032 lithium battery, auto-off after 3 minutes, low-battery indicator, ~1 year battery life Range: 0-999 ppm, 1 ppm resolution, ±2% accuracy Calibration: factory-tested, with a manual calibration option Includes: Titanium S2 inline TDS meter, CR2032 battery, two 1/4in push-connect union tees.Comparing pre- and post-filter readings side by side is the real value here — it tells you exactly how much your membrane and resin are actually removing, rather than just confirming the final output number.
