Inline TDS S3 – Triple Inline TDS

This inline TDS meter is intended for aquarists who run a reverse osmosis (RO) system and need to check the output water before it reaches the tank. Its probe is installed on the RO line with the supplied tee fitting, so the water quality can be read at each stage of filtration, and the reading shows when a membrane or DI cartridge is no longer performing.

Why it matters

• The probe is installed before and after the membrane and before the DI cartridge, so each stage can be checked and the exhausted component identified.
• The probe is made of titanium, which resists corrosion in continuous contact with water.
• The meter measures electrical conductivity of the water, which rises with dissolved contaminants, so a higher reading indicates lower water purity.
• The display has a backlit LCD and a magnetic mount, so it can be placed on any metal surface, including the inside of a cabinet under the sink.
• The screen turns off automatically after 180 seconds to save battery, and a low-battery icon appears before the battery runs out.

Specifications

• Number of probes: three
• Measuring range: 0-999 ppm
• Resolution: 1 ppm
• Accuracy: ±2%
• Power: CR2032 lithium battery x1
• Battery life: 12 months on one battery

What it works with

The meter is designed for RO systems used in aquarium water preparation, where it is placed on the water line at the filtration stages listed above. It can be calibrated using the two buttons on the display if the reading needs adjustment. It is an accessory for the RO line and does not replace a laboratory test.