Milwaukee EC59 PRO Waterproof 3-in-1 Conductivity / TDS & Temperature Tester with Replaceable Probe

EC Range: 0 - 3999 uS/cm | 0 to 2000 ppm | 0.0 to 60.0°C (32.0 to 140.0°F)
Resolution: 1 uS/cm / 1 ppm / 0.1 C / 0.1 F
EC/TDS/TEMP Accuracy: 2% Full Scale | +/-0.5°C (+/-1F)
Temperature Compensation: Automatic
Milwaukee EC59 PRO Waterproof 3-in-1 Conductivity / TDS & Temperature Tester with Replaceable Probe has been successfully added to your cart. Feel free to continue shopping or check out.


The Milwaukee EC59 PRO Conductivity (EC) & Total Dissolved Solids (TDS) Tester is designed for aquaculture, food, wine, laboratory, water treament and many other applications. It is the ideal meter to help make sure that your EC/TDS/Temp. needs are being met and are reliable results for your analysis. Keep EC/TDS/TEMP. in your target range to help your achieve best results.


  • Measures EC/TDS/Temp. with automatic temperature compensation (ATC).
  • Ideal range for all different applications (0 to 3999 uS/cm) | 0 to 2000 ppm | 0.0 to 60°C (32.0 to 140.0°F).
  • Units in uS/cm or ppm easily convertable to other ranges.
  • Factory calibrated with the ability to recalibrate if needed.
  • Replaceable electrode Mi59P.
  • Fully waterproof to IP65.
  • Approximately 100 hours of use (4 x 1.5V batteries included).



EC electrodes can develop nutrient build up over time. To miminize build up, always rinse the probe in fresh tap water after every use.


The Milwaukee PRO Conductivity Tester, like all conductivity meters, provides a measure of electrically charged ions in a solution and is an absolute measure of conductivity.
EC/TDS can converted. Different scales include the 500 scale, 650 scale and the 700 scale.
Your uS/cm reading can be approximately converted to other scales as shown in the examples below.
2.00 mS/cm = 2000 uS/cm = 1000 ppm on .50 factor scale
2.00 mS/cm = 2000 uS/cm = 1400 ppm on the 442 scale or .70 factor scale


EC Range: 0 - 3999 uS/cm
TDS Range: 0 - 2000 ppm
Temp Range: 0.0 to 60.0°C / 32.0 to 140.0°F
EC Resolution: 1 uS/cm
TDS Resolution: 1 ppm
Temp Resolution: 0.1°C / 0.1°F
EC Accuracy: 2% Full Scale
TDS Accuracy: 2% Full Scale
Temp Accuracy: ±0.5°C / ±1°F
EC Typical EMC Deviation: 2% Full Scale
TDS Typical EMC Deviation: 2% Full Scale Temp
Typical EMC Deviation Temperature: ±0.5°C / ±1°F
Calibration: Automatic, 1 point
Temperature Compensation: Automatic, with β=0.0 to 2.4%/°C
Probe: Mi59P (replaceable)
Environment: 0 to 50°C / 32 to 122°F; max RH 100%
Battery Type: 4 x 1.5V; IEC LR44, A76 (included)
Battery Life: Approx. 100 hours of use
Auto-off: After 8 minutes of non-use
Dimensions: 7.9 × dia 1.5 inches
Weight: 3.5 ounces

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