AutoAqua Titanium S3 - Triple Inline TDS Meter

For anyone serious about producing quality RO/DI water for their reef tanks, AutoAqua now has four great TDS meter options built on a compact, feature-rich, and easy to install platform!

A TDS meter can not only provide peace of mind in monitoring your final product water, but it can also clue you in to when it's time to replace filter media. The Titanium S3 model features three remote TDS probes and cords, along with a magnetic display that makes for easy installation on the metal frame common on most RO and RO/DI systems. This allows for readings at three locations in the system, such as the source line feeding the system, after the RO membrane and finally after the DI resin stage, allowing for monitoring at all major water quality locations.


The Titanium series of TDS meters from AutoAqua are the smallest inline TDS meter in the hobby, making it very easy to find a spot to mount the display, and as the name would suggest, the TDS probes have titanium conductors, which provide great longevity and protection from corrosion. In addition, each Titanium TDS meter features a big backlit LCD display that activates with a single button push, giving you quick access to water quality readings. They also include push-connect union tees with each meter for fast and simple installation on your system lines. 

  • Backlit LCD Display
  • Simple installation with a 1/4 in. push connect union tee included
  • Magnetic display mount
  • High quality titanium probe
  • Compact design
  • Auto-off function
  • Calibratable
  • Low battery indicator
  • Probes: 3
  • Range: 0-999 ppm
  • Resolution: 1 ppm
  • Accuracy: +/- 2%
  • Power Source: CR2032 battery
  • Battery Life: Approx. 1 Year
  • Titanium S3 (Model TDS-300S) Inline TDS Meter
  • Battery
  • 1/4" Push-Connect Union Tee (x3)