Saw this over at Marine Depot and thought it was pretty cool and could really be of some use - if it actually works. And the price isn't bad at all - $60
The Dual TDS meter offers an easy and convenient way of monitoring the performance of your RO or RO/DI unit. It allows you to quickly check the quality of the inlet and outlet water and helps you to determine when the cartridges need to be replaced. It is a great addition to any RO or RO/DI unit.
Features:
* Highly efficient and accurate due to its advanced microprocessor technology.
* Displays TDS levels of the Feed Water and Product Water with in & out electrode probes.
* Auto-Off function conserves battery power. The unit shuts off automatically after 10 minutes of non-use.
* Dual Range - Measures from 0 ~ 999ppm, with a resolution of 1ppm.
* Factory Calibrated -Recalibration is not necessary.
* Comes equipped with John Guest Quick-Connect T-fittings as shown.
* Installs quickly and easily.
The Dual TDS meter offers an easy and convenient way of monitoring the performance of your RO or RO/DI unit. It allows you to quickly check the quality of the inlet and outlet water and helps you to determine when the cartridges need to be replaced. It is a great addition to any RO or RO/DI unit.
Features:
* Highly efficient and accurate due to its advanced microprocessor technology.
* Displays TDS levels of the Feed Water and Product Water with in & out electrode probes.
* Auto-Off function conserves battery power. The unit shuts off automatically after 10 minutes of non-use.
* Dual Range - Measures from 0 ~ 999ppm, with a resolution of 1ppm.
* Factory Calibrated -Recalibration is not necessary.
* Comes equipped with John Guest Quick-Connect T-fittings as shown.
* Installs quickly and easily.

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