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Milwaukee Instruments

pH / ORP / Temperature Laboratory Bench Meter

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This high performance economy microprocessor-based pH/ORP/Temp Bench meter is an ideal tool in schools, laboratories and production plants.

It is provided with a series of new diagnostic features which add an entirely new dimension to the measurement of pH, by allowing the user to dramatically improve the reliability of the measurement:

  • Automatic Temperature Compensation (ATC) for good accuracy under fluctuating temperatures;
  • Hold Function freezes reading for easy viewing;
  • Easy to read large custom LCD;
  • Stability Indicator prompts whenever reading stabilizes;
  • 7 memorized buffers (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45) for calibration;
  • Messages on the LCD to make the calibration easy and accurate;
  • User-selectable “calibration time out” to remind when a new calibration is necessary.

Mi151 can also measure with ORP electrodes, thanks to its capability to measure mV with a resolution up to 0.1 mV. For accurate measurements, use the electrode holder supplied with the meter.

pH Range-2.00 to 16.00 pH
mV Range±699.9 mV / ±1999 mV
Temp Range-20.0 a 120.0°C / -4.0 a 248.0°F
pH Resolution0.01 pH
mV Resolution0.1 mV / 1 mV
Temp Resolution0.1°C / 0.1 °F
mV Accuracy±0.2 mV / ±1 mV
pH Accuracy±0.01 pH
Temp Accuracy±0.4°C / ±0.8°F
pH Typical EMC Deviation±0.02 pH
mV Typical EMC Deviation±0.2 mV / ±1 mV
Temp Typical EMC Deviation±0.4°C / ±0.8°F
pH Automatic Calibration1 or 2 point-calibration, with 7 memorized buffers
Offset Calibration±1 pH
Slope Calibrationfrom 80 to 108%
Temperature Compensationautomatic, from -20.0 to 120.0°C / -4.0 to 248.0°F
or manual, without temperature probe
pH ElectrodeMA917B/1 (included)
Temperature ProbeMA831R (included)
Environment0 to 50°C / 32 to 122°F; max RH 95%
Input Impedance1012 Ohm
Power Supply12 VDC power adapter (included)
Dimensions230 x 160 x 95 mm
Weight0.9 kg

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pH / ORP / Temperature Laboratory Bench Meter
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