Instruction manual
Instruction Manual

Mi151 pH / ORP / Temperature Laboratory Bench Meter

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.

Glass Electrode & Temperature Probe
Choose from our wide selection of pH and ORP electrodes.
Custom dual level LCD
Large and easy-to-read Custom dual level LCD Display with simultaneous readings and with user-friendly icons.
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 Resolution 0.01 pH
mV Resolution 0.1 mV / 1 mV
Temp Resolution 0.1°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 Calibration 1 or 2 point-calibration, with 7 memorized buffers
Offset Calibration ±1 pH
Slope Calibration from 80 to 108%
Temperature Compensation automatic, from -20.0 to 120.0°C / -4.0 to 248.0°F
or manual, without temperature probe
pH Electrode MA917B/1 (included)
Temperature Probe MA831R (included)
Environment 0 to 50°C / 32 to 122°F; max RH 95%
Input Impedance 1012 Ohm
Power supply 12 VDC power adapter (included)
Dimensions 230 x 160 x 95 mm
Weight 0.9 kg
MA9001 pH 1.68 buffer solution, 230 mL bottle
MA9004 pH 4.01 buffer solution, 230 mL bottle
MA9006 pH 6.86 buffer solution, 230 mL bottle
MA9007 pH 7.01 buffer solution, 230 mL bottle
MA9009 pH 9.18 buffer solution, 230 mL bottle
MA9010 pH 10.01 buffer solution, 230 mL bottle
MA9012 Refilling solution for pH electrode, 230 mL bottle
MA9015 Electrode storage solution, 230 mL bottle

Electrode cleaning solution, 230 mL bottle

MA9112 pH 12.45 buffer solution, 230 mL bottle
MA9315 Electrode Holder
MA917B/1 Glass body, double junction refillable pH electrode
SE300 Double junction, gel filled ORP electrode with platinum sensor
MA831R Temperature probe
Mi151 is supplied complete with:
• MA917B/1 Double junction refillable pH electrode
• MA831R Temperature Probe
• MA9315 Electrode Holder
• M10004 pH 4.01 Sachet Buffer Solution
• M10007 pH 7.01 Sachet Buffer Solution
• M10010 pH 10.01 Sachet Buffer Solution
• M10016 Sachet Electrode Cleaning Solution
• Graduate Pipet
• 12 VDC Adapter
• Instruction manual