Benchtop pH/ORP/lon Meter PH-920 Biobase

Benchtop pH/ORP/Ion Meter PH-920 Biobase

The PH-920 Benchtop pH/ORP/Ion Meter by Biobase is a high-precision laboratory instrument designed for versatile electrochemical measurements. With multi-point calibration, automatic electrode diagnostics, and advanced data management functions, it ensures accurate and reliable pH and ORP testing. The upgraded model PH-930 additionally supports ion concentration measurement, making it ideal for laboratories, environmental monitoring, and industrial applications.

Features

pH Measurement

1. 1 to 5-point calibration with automatic recognition of USA, NIST, and DIN buffers.

2. Automatic electrode diagnosis showing pH slope and offset.

3. Automatic temperature compensation across the full range.

4. Calibration due alarm prompts regular recalibration for accuracy.

ORP Measurement

1. 1-point offset calibration for adjusting values to standard references.

2. Relative and absolute millivolt modes for reliable ORP analysis.

Ion Concentration (for PH-930)

1. 2 to 5-point calibration with up to 8 selectable concentration points.

2. Direct ion concentration readout for simplified measurement.

3. Automatic electrode diagnosis for calibration points and slope values.

4. Selectable measurement units: ppm, mg/L, mol/L, mmol/L, with ionic valency input.

General Features

1. Auto-Read function detects stable readings and locks endpoints.

2. Setup menu allows configuration of buffer set, calibration points, resolution, stability criteria, units, and date/time.

3. Reset function restores all parameters to factory defaults.

4. Internal memory stores up to 500 data sets.

5. USB communication interface for easy data transfer and interval logging.

Applications

1. Routine pH and ORP measurements in laboratories.

2. Environmental water quality monitoring.

3. Food, beverage, and pharmaceutical quality control.

4. Research and teaching laboratories requiring precise multi-parameter measurements.

5. Extended ion concentration analysis (with PH-930 model).

Technical Specifications

pH

• Range: -2.000 ~ 20.000 pH

• Accuracy: ±0.002 pH

• Resolution: 0.1, 0.01, 0.001 pH (selectable)

• Calibration points: 1 to 5

• Calibration solutions: USA, NIST, DIN, or 2 custom buffers

ORP

• mV range: ±1999.9 mV

• Relative mV range: ±1999.9 mV

• Resolution: 0.1 or 1 mV (selectable)

• Accuracy: ±0.2 mV

• Calibration: 1 point

Ion Concentration (only PH-930)

• Range: 0.001 ~ 19999 ppm / mg/L / mol/L (depending on ISE)

• Resolution: 0.001, 0.01, 0.1, 1

• Accuracy: ±0.5% F.S. (monovalent), ±1% F.S. (divalent)

• Calibration: 2 to 5 points

• Calibration standards: 0.001, 0.01, 0.1, 1, 10, 100, 1000, 10000

Temperature

• Range: 0 ~ 105°C / 32 ~ 221°F

• Resolution: 0.1°C / 0.1°F

• Accuracy: ±0.5°C / ±0.9°F

• Offset calibration: 1 point, ±10°C

• Compensation: 0 ~ 100°C, manual or automatic

Other Specifications

• Stability criteria: low or high selectable

• Calibration due alarm: 1 to 31 days or off

• Slope/offset display: available

• Hold function: manual or auto-endpoint

• Memory: 500 data sets

• Data interface: USB

• Connectors: BNC, 3.5 mm jack socket

• Display: custom LCD (125 × 100 mm)

• Power supply: DC5V adapter

• Dimensions: 210 × 188 × 60 mm

• Net weight: 1.5 kg

• Package size: 310 × 240 × 180 mm

• Gross weight: 1.7 kg

Accessories Included

1. E201-BNC plastic-body pH electrode

2. Temperature probe

3. pH buffer sachets

4. Electrode holder

5. DC5V power adapter

Conclusion

The Biobase PH-920 Benchtop pH/ORP/Ion Meter is a robust and precise laboratory instrument for comprehensive water quality testing. It provides high-accuracy pH and ORP measurements with multi-point calibration, auto diagnostics, and advanced data logging. For extended capabilities, the PH-930 model supports direct ion concentration analysis, making this series an excellent choice for research, teaching, and industrial quality control.