IQ128 miniLab Pocket pH meter  - professional version, allowing for up to a three-point calibration.

This new pocket pH meter allows 1,2 or 3 point calibration for improved accuracy and reports to 0.01 pH units. The meter clearly displays pH and temperature simultaneously

Features:

• Pocket-size, waterproof, rugged pH meter
• 6-mL dropper bottle of pH 4, 7, and 10 calibration buffers included
• Durable non-glass solid-state (ISFET) pH sensor
• 1, 2, or 3-point calibration
• Replaceable reference electrode
• Minimum one-drop sample or calibration buffer volume
• Automatic temperature compensation
• pH range: 2.0 to 12.0 pH
• pH resolution: 0.01 pH
• pH accuracy: +/-0.02 pH
• Temperature range: +5 to +40°C
• Temperature resolution: 0.1°C or 0.1°F