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Myron L<sup>®</sup> - Model DS and pDS Meters -Conductivity / TDS and pH for Professionals
Conductivity or TDS & pH . 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.
Breakage is one of the major causes of sensor failure in a typical pH or conductivity instrument. Myron L® instruments provide maximum protection for both the pH and conductivity electrodes inside the cell cup. The user-replaceable pH electrode features a chemical-resistant, porous liquid junction.
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.
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.
- Rinse and fill cell cup
- Select Conductivity/TDS range
- Push button to indicate reading
Part Number Description
- 512M5 DS Conductivity Meter: 0-5000 µM/µS
- 512M10 DS Conductivity Meter: 0-10,000 µM/µS
- 512T4 DS TDS Meter: 0-2500 ppm
- 512T5 DS TDS Meter: 0-5000 ppm
- 512T5D POOLMETER™ DS TDS Meter: 0-5000 ppm/442, 0-5000 ppm/NaCl
- 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
- AG-5 AGRI-METER™ DS Conductivity Meter: 0-5 millimhos
- D-1 DIALYSATE METER™ DS Conductivity Meter: 11-15 millimhos
- D-2 DIALYSATE METER™ DS Conductivity Meter: 0-10 & 0-20 millimhos
- 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
- RO-1 RO METER™ DS TDS Meter: 0-1250 ppm (with color band)
- RO-1NC RO METER™ DS TDS Meter: 0-1250 ppm (no color band)
Part Number Description
- EP11/PH pDS pH/Conductivity Meter: 0-10, 100, 1000, 10,000 µM/µS; 2-12 pH
- T6/PH pDS pH/TDS Meter: 0-5000 ppm; 2-12 pH
- Ranges: Conductivity
- pH: 1, 3, 4 or 5 depending on model, 2-12 pH (pDS Meters only) (See meters table)
- Readout: : 2½ in. taut-band shock resistant meter
- Units of Measure* : Choice of parts per million (ppm) TDS or micromhos (µM)/microsiemens (µS) conductivity
- Accuracy: Conductivity pH : ±2% full scale, ±0.2 pH units
- Repeatability : ±1%
- Temperature Compensation : Automatic (to 25°C/77ºF) for conductivity samples between 10-71°C/50-160°F
- Calibration Controls Conductivity: pH Zero and pH Gain
- Electrodes (built-in) : Conductivity: Never need replatinizing pH: KCl gel-filled, field replaceable
- Cell Cup : Chip and crack resistant polyethylene
- Circuitry : Very stable; requires minimal recalibration
- Power : One 9 volt battery supplied;
- Battery Life: >2000 tests/1 year
- Dimensions : 3.4 W x 4.5 D x 4.0 H in./ 86 W x 114 D x 102 H mm
- Weight : 1 lb./0,45 kg


- Boilers & cooling towers
- Deionization
- Reverse osmosis
- Chemical concentrations
- Printing fountain solutions
- Swimming pools & spas
- Water pollution control
- Wastewater
- NIST Standard Solutions & pH Buffers: All Myron L instruments are factory calibrated with Standard Solutions of known conductivity/TDS values 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.
Note: pH 7 Buffer is especially important and should be used every 1- 2 weeks.
KEY – ORDER # – VALUES (Specify Quarts, Gallons or 2 oz. bottles*)- A 442-15 (15 ppm/24 µS)
- B 442-30 (30 ppm/47 µS)
- C 442-150 (150 ppm/229 µS)
- D 442-300 (300 ppm/445 µS)
- E 442-1000 (1000 ppm/1417 µS)
- F 442-1500 (1500 ppm/2060 µS)*
- G 442-3000 (3000 ppm/3900 µS)*
- H 442-15000 (15,000 ppm/16,630 µS)
- I 442-30000 (30,000 ppm/30,100 µS)
- J KCL-18 (11 ppm/18 µS)
- K KCL-70 (45 ppm/70 µS)
- L KCL-180 (116 ppm/180 µS)
- M KCL-700 (478 ppm/700 µS)
- N KCL-1800 (1294 ppm/1800 µS)*
- O KCL-7000 (5687 ppm/7000 µS)*
- P KCL-18000 (16,462 ppm/18,000 µS)
- PH4 pH 4 (red)*
- PH7 pH 7 (yellow)*
- PH10 pH 10 (blue)*
- SS pH Sensor Storage Solution*
- Example: To order 1 qt. of pH 4, order # PH4Q.
*Values available in 2 oz. bottles
- 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.
