- HM Digital 342 ppm TDS and EC Calibration Solution
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TDS solutions

We are an official HM Digital Distributor for the Philippines.

For optimal performance, re-calibrate your meters periodically or if testing TDS or conductivity levels in wide or different ranges.


  • NaCl calibration solution, 342 ppm.  Also Available in 1000 ppm.
  • Comes in lightweight HDPE plastic bottles.
  • Sealed with a coated foam liner.