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HM Digital manufactures advanced water testing instruments, including TDS, pH, EC, and temperature meters for consumer and commercial applications.

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HM Digital COM-80 EC/TDS Hydro Tester User Manual

HM Digital COM-80 EC/TDS Hydro Tester User Manual

COM-80 • October 6, 2025
Official user manual for the HM Digital COM-80 Electrical Conductivity (EC) and Total Dissolved Solids (TDS) Hydro Tester, providing instructions for setup, operation, maintenance, and specifications.