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HM Digital In-line Dual TDS Meter



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.



  • 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. 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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  • Model: HM1403
  • Manufactured by: HM Digital

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