DS/ pDS Meters

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No water supply is completely pure. Every industrial, commercial, or natural source contains dissolved solids or salts. These impurities contribute to scale, corrosion, poor taste, and environmental pollution that endanger animal and plant life.

Myron L Company has two proven ways to measure such impurities. Our DS Meters™ provide fast, accurate, on-the-spot measurements of total dissolved solids (TDS) or conductivity. pDS Meters™ test conductivity or TDS, plus pH. Readings from their highly stable circuitry help assure product quality, prevent equipment damage and verify in-line instrumentation in a wide range of applications, some of which are listed above.

Our unique, durable, field-tested design has evolved over more than 40 years, making Myron L instruments among the most reliable and popular of their kind in the world. They’re lightweight and compact, yet Myron L’s DS and pDS Meters are also tough, with rugged, taut-band meter movements. Put our meters to the test. Even after years of rough field service, they’ll surpass your expectations of accuracy, reliability and simplicity.



  • Conductivity
  • Resistivity (EP only)
  • Reverse osmosis
  • TDS
  • pH



  • Wastewater
  • River and Stream Water
  • Boiler Water & Condensate
  • Rinse Water Quality
  • Cooling Towers
  • Chemical Concentrations
  • RO Systems
  • Water Pollution Control
  • Deionized Water
  • Dampening Solutions
  • Electroplating
  • Swimming Pools & Spas
  • Industrial Pollution
  • Fountain Solution Concentration


Benefits and Features

  • Choice of TDS or conductivity
  • Single-, three-, four-, and five-range models
  • Ranges: 0-50 to 0-50,000 μM/μS/ppm/TDS
  • Chip/crack resistant cell cup
  • Easy to calibrate
  • Fast, automatic temperature compensation to 25°C
  • Shock resistant meter movement
  • Conductivity and pH electrodes mounted in cell cup for maximum protection


Part Number Description
512M2 DS Conductivity Meter: 0-50 µM/µS
512M3 DS Conductivity Meter: 0-500 µM/µS
512M4 DS Conductivity Meter: 0-2500 µM/µS
512M5 DS Conductivity Meter: 0-5000 µM/µS
512M10 DS Conductivity Meter: 0-10,000 µM/µS
512T2 DS TDS Meter: 0-50 ppm
512T3 DS TDS Meter: 0-500 ppm
512T4 DS TDS Meter: 0-2500 ppm
512T5 DS TDS Meter: 0-5000 ppm
512T10 DS TDS Meter: 0-10,000 ppm
532M1 DS Conductivity Meter: 0-50, 500, 5000 µM/µS
532T1 DS TDS Meter: 0-50, 500, 5000 ppm
532T2 DS TDS Meter: 0-25, 250, 2500 ppm
EP-10 DS Conductivity Meter: 0-10, 100, 1000, 10,000 µM/µS
EP DS Conductivity/Resistivity Meter: 0-0.5, 5, 50, 500, 5000 µM/µS; 2-30 MΩ
EP11/PH pDS pH/Conductivity Meter: 0-10, 100, 1000, 10,000 µM/µS; 2-12 pH
M6/PH pDS pH/Conductivity Meter: 0-5000 µM/µS; 2-12 pH
T2/PH pDS pH/TDS Meter: 0-50, 500, 5000 ppm; 2-12 pH
T6/PH pDS pH/TDS Meter: 0-5000 ppm; 2-12 pH