

The Digital Inline TDS Titanium S3 fromAutoAqua is a 3-probe inline TDS meter for reliably measuring water quality at different stages of your reverse osmosis unit. Ideal for monitoring water purity and planning the replacement of filter cartridges, it combines precision, durability and simplicity of installation.
The Digital Inline TDS - Titanium S3 fromAutoAqua is an essential measuring device for any aquarist concerned about the quality of their RO water. Thanks to its 3 independent probes, it allows you to control the dissolved solids (TDS) rate at three key points in your installation: at the inlet, before the deionization resin and at the outlet of your reverse osmosis unit.
The Titanium S3 instantly displays the TDS value (0 to 999 ppm) of each probe, giving you a real-time analysis of the efficiency of your filtration system. This precise monitoring allows you to anticipate the replacement of the cartridges or the reverse osmosis membrane before any degradation of the water quality.
TDS (Total Dissolved Solids) is the total amount of minerals and impurities dissolved in water. A high TDS indicates impure water, while a near-zero TDS ensures optimal RO water quality — essential for the health of fish, corals, and invertebrates in reef aquariums.
Installing the Titanium S3 takes just a few minutes:
| Feature | Detail |
|---|---|
| Mark | AutoAqua |
| Model | Digital Inline TDS - Titanium S3 |
| Reference | TDS300S |
| Number of probes | 3 titanium probes |
| Measuring range | 0 – 999 ppm |
| Resolution | 1 ppm |
| Precision | ± 2% |
| Feeding | CR2032 lithium battery |
| Autonomy | Approximately 1 year |
| Automatic extinguishing | After 3 minutes of inactivity |
| Fixation | Magnetic (back) |
| Fittings provided | 3x "T" Push Connect 1/4" |
💡 Recif'Art advice: combine the Titanium S3 with a high-performance osmosis unit for continuous monitoring of water quality. A low TDS ensures pure water and better health for your corals and invertebrates.
⚠️ Use for aquarium purposes only. Do not submerge the main case. Keep out of reach of children.
The Titanium S3 allows you to measure dissolved solids (TDS) at three key points in your reverse osmosis unit: at the inlet, before the deionization cartridge, and at the outlet. It instantly tells you when the water is pure and when to replace the cartridges or membrane.
The Titanium S3 has three titanium probes for simultaneous control of multiple measurement points, while the S1 model has only one probe. The S3 is ideal for users who want complete monitoring of their reverse osmosis unit.
Installation is simple with the included 1/4" Push Connect "T" fittings. Simply cut the hose in the desired places, insert the fittings, and then place the probes in it. The magnetic mount makes it easy to attach the case to a metal frame.
Yes, all three titanium probes offer excellent corrosion resistance, ensuring accurate and long-lasting measurements, even in a wet or saline environment.
Yes, it can be calibrated regularly to maintain optimal accuracy in reading the TDS. This allows for reliable results in the long term.
The Titanium S3 runs on a supplied CR2032 lithium battery and offers a battery life of about one year. It automatically shuts off after three minutes of non-use to save energy.
The Titanium S3 measures from 0 to 999 ppm with a resolution of 1 ppm and an accuracy of ±2%, making it ideally suited for tracking reverse osmosis systems.
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The Digital Inline TDS Titanium S3 fromAutoAqua is a 3-probe inline TDS meter for reliably measuring water quality at different stages of your reverse osmosis unit. Ideal for monitoring water purity and planning the replacement of filter cartridges, it combines precision, durability and simplicity of installation.














