These products can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP),
which is known to the State of California to cause cancer and birth defects or other reproductive harm.
For more information go to www.P65Warnings.ca.gov

Click here for detailed image

Conductivity / TDS and pH for Professionals


Boilers & cooling towers


Reverse osmosis

Chemical concentrations

Printing fountain solutions

Swimming pools & spas

Water pollution control


Readings  You Can Count On

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.


Unique Field-Tested Design

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.

Accurate readings in three easy steps

Rinse and fill cell cup

Select Cond/TDS range

Push button to indicate reading

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Select From Our Complete Line of DS/pDS Meters


                            DS CONDUCTIVITY / TDS METERS

Part Number



DS Conductivity Meter: 0-2500 µM/µS


DS Conductivity Meter: 0-5000 µM/µS


DS Conductivity Meter: 0-10,000 µM/µS


DS TDS Meter: 0-2500 ppm


DS TDS Meter: 0-5000 ppm



0-5000 ppm/442, 0-5000 ppm/NaCl


DS TDS Meter: 0-10,000 ppm


DS Conductivity Meter: 0-50, 500, 5000 µM/µS


DS TDS Meter: 0-50, 500, 5000 ppm


DS TDS Meter: 0-25, 250, 2500 ppm


AGRI-METER™ DS Conductivity Meter: 0-5 millimhos


DIALYSATE METER™ DS Conductivity Meter:

11-15 millimhos


DIALYSATE METER™ DS Conductivity Meter:

0-10 & 0-20 millimhos


DS Conductivity Meter: 0-10, 100, 1000, 10,000 µM/µS


DS Conductivity/Resistivity Meter: 0-0.5, 5, 50, 500, 5000 µM/µS; 2-30 MΩ


RO METER™ DS TDS Meter: 0-1250 ppm (with color band)


RO METER™ DS TDS Meter: 0-1250 ppm (no color band)

                          pDS pH/CONDUCTIVITY / TDS METERS

Part Number



AGRI-METER™  pDS pH/Conductivity Meter:

0-5 millimhos; 2-12 pH


pDS pH/Conductivity Meter: 0-10, 100, 1000,

10,000 µM/µS; 2-12 pH


pDS pH/Conductivity Meter: 0-5000 µM/µS; 2-12 pH


pDS pH/TDS Meter: 0-5000 ppm; 2-12 pH


Accessories we recommend

Standard Solutions: NIST Standard Solutions & pH Buffers All Myron L® instruments are factory calibrated with Standard Solutions of known conductivity/TDS value and (when appropriate) with pH buffer values 4, 7 and 10. These solutions and buffers are traceable to the U.S. Government’s National Institute of Standards and Technology. Periodic recalibration with the appropriate Standard Solutions and pH Buffers will help maintain the accuracy of your instrument. See the table above for recommendations. Note: pH 7 Buffer is especially important and should be used every 1- 2 weeks.

Range Extender: Increases the conductivity/TDS range by a factor of 10 when inserted into the sample filled cell cup. Not available for model 512T10. Model: RE-10

Porta-Kit (pDS only): Hard foam-lined case with 2 oz. bottles of pH Buffers 4, 7 and 10 and conductivity Standard Solution. Model: PK3 for models M6/PH, T2/PH & T6/PH; Model: PK7 for EP11/PH.

Replacement pH Sensor: Replacement pH Sensor is a unique non-refillable KCl gel-filled combination pH electrode, featuring a porous liquid junction. Model: RPY

NIST Certification: Certificates are available that confirm NIST traceability of an instrument (Order #MC) or Standard Solution/pH Buffer (Order #SC). Note: Both MC Certificates and/or SC Solution Certificates must be specified when placing instrument/solution orders.


Additional Information
DS & pDS Meters™ Data Sheet
(includes specs, options & order info)
click here: PDF
Price List click here: PDF


Limited Warranty
All Myron L® DS Meters and pDS Meters have a Two (2) Year Limited Warranty, excluding the pH sensors, which have a Six (6) Month Limited Warranty. Warranty is limited to the repair or replacement of the DS Meter or pDS Meter only, at our discretion. The Myron L® Company assumes no other responsibility or liability.


                      Site last updated on: 30-Apr-2008 

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