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Milwaukee MI805 Portable pH/EC/TDS/Temperature Meter

SKU: 9139-MI805~ea

SKU: 9139-MI805~ea

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Mi805 includes the following:  

  • MA851D/1 pH/EC/TDS/Temp amplified probe with 1 meter cable
  • 2x20 mL pH 4.01 and pH 7.01 sachets of calibration solution
  • 2x20 mL 1413 µS/cm sachets of calibration solutions
  • 2x20 mL sachet of electrode cleaning solutions
  • rugged carrying case
  • 9V battery and instructions.



pH Range

0.00 to 14.00 pH

EC Range

0 to 3999 µS/cm

TDS Range

0 to 1999 ppm

Temp Range

0.0 to 60.0°C / 32.0 to 140.0°F

pH Resolution

0.01 pH

EC Resolution

1 µS/cm

TDS Resolution

1 ppm

Temp Resolution

0.1°C / 0.1°F

pH Accuracy


EC/TDS Accuracy

±2% Full Scale

Temp Accuracy

±0.5°C / ±1°F

pH Typical EMC Deviation

±0.02 pH

EC/TDS Typical EMC Deviation

±2% Full Scale

Temp Typical EMC Deviation

±0.5°C / ±1°F

Temperature Compensation

automatic from 0 to 60°C;
with ß adj. from 0.0 to 2.4%/°C

pH Calibration

automatic, 1 or 2-point
with automatic buffer recognition

EC Calibration

automatic, 1 point

EC/TDS Conversion Factor

adj. from 0.45 to 1.00


MA851D/1 amplified pH/EC/TDS/Temperature probe with DIN connector and 1 m cable (included)


0 to 50°C / 32 to 122°F; max RH 95%

Battery Type

1 x 9V (included)

Battery Life

approx. 150 hours of use


after 8 minutes of non-use


200 × 85 × 50 mm


260 g

Download(s) Available: MI805-806 Literature
Download(s) Available: MI805 Manual