Model	pH-11	pH-22	pH-33
Measurement Principle	Glass Electrode
Minimum Sample Volume	0.1ml (0.05ml with Sampling Sheet B)
pH Range & Resolution
0.0 to 14.0 pH : 0.1 pH	•
0.00 to 14.00 pH : 0.01 pH		•	•
mV Range & Resolution
± 650 mV : 1mV	•	•	•
Calibration Points
Up to 2	•
Up to 3		•
Up to 5			•
Accuracy
±0.1 pH	•
±0.01 pH		•	•
Temperature Display	0 to 50.0 °C			•
Temperature Calibration	5 to 40.0 ºC			•
Display	Custom (monochrome) digital LCD with backlight
Operating Temperature	5 to 40°C
Operating Humidity	85% or less relative humidity (no condensation)
Power	CR2032 batteries (2)
Battery Life	Approx. 400 hours in continuous use (without backlight)
Dimensions	164 × 29 × 20mm (excluding projections)
Mass	Approx. 55 g (including sensor and batteries)
Functions	Auto Calibration Auto Buffer Recognition Auto Temperature Compensation Temperature Calibration (only for pH-33) Auto Stable / Auto Hold Measurement Auto Power Off (30mins) Switchable Backlight Low Battery Indicator IP67 Dust / Waterproof Replaceable Sensor

Model

pH-11

pH-22

pH-33

Measurement Principle

Glass Electrode

Minimum Sample Volume

0.1ml (0.05ml with Sampling Sheet B)

pH Range & Resolution

0.0 to 14.0 pH : 0.1 pH

•

0.00 to 14.00 pH : 0.01 pH

•

mV Range & Resolution

± 650 mV : 1mV

•

Calibration Points

Up to 2

•

Up to 3

•

Up to 5

•

Accuracy

±0.1 pH

•

±0.01 pH

•

Temperature Display

0 to 50.0 °C

•

Temperature Calibration

5 to 40.0 ºC

•

Display

Custom (monochrome) digital LCD with backlight

Operating Temperature

5 to 40°C

Operating Humidity

85% or less relative humidity (no condensation)

Power

CR2032 batteries (2)

Battery Life

Approx. 400 hours in continuous use (without backlight)

Dimensions

164 × 29 × 20mm (excluding projections)

Mass

Approx. 55 g (including sensor and batteries)

Functions

Auto Calibration
Auto Buffer Recognition
Auto Temperature Compensation
Temperature Calibration (only for pH-33)
Auto Stable / Auto Hold Measurement
Auto Power Off (30mins)
Switchable Backlight
Low Battery Indicator
IP67 Dust / Waterproof
Replaceable Sensor

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LAQUAtwin pH-11

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