Benchtop pH/ORP/Ion Meter PH-920 (CAT#: STEM-OEM-0261-ZJF)

The Benchtop pH/ORP/Ion Meter is a high-accuracy analytical instrument designed to measure pH, oxidation-reduction potential (ORP), and ion concentration in laboratory and industrial applications. Its precise performance and versatility make it suitable for environmental monitoring, chemical research, and quality control workflows.

pH
- Range: -2.000~20.000 pH
- Accuracy: ±0.002 pH
- Resolution: 0.1, 0.01, 0.001 pH, selectable
- Calibration Points: 1~5 points
- Calibration Solutions: USA, NIST, DIN, 2 custom buffers
ORP
- mV Range: ±1999.9 mV
- Relative mV Range: ±1999.9 mV
- Resolution: 0.1, 1 mV, selectable
- Accuracy: ±0.2 mV
- Calibration Points: 1 point
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, reading ±10°C
Other Specifications
- Temperature Compensation: 0~100°C, manual or automatic
- Stability Criteria: Low or high
- Calibration Due Alarm: 1 to 31 days or off
- Slope/Offset Display: Yes
- Hold Function: Manual or auto-endpoint
- Memory: 500 data sets
- Communication Interface: USB
- Connector: BNC, 3.5mm jack socket
- Display: Custom LCD (125×100 mm)
- Power Requirements: DC5V power adapter
- Dimensions: 210×188×60 mm
- Net Weight: 1.5 kg
- Package Size: 310×240×180 mm
- Gross Weight: 1.7 kg

pH Measurement:
1 to 5 points calibration with automatic recognition for USA, NIST, and DIN buffer solutions.
Automatic electrode diagnosis displays pH slope and offset.
Automatic temperature compensation ensures accurate readings across the full range.
Calibration due alarm reminds users to perform regular calibration.
ORP Measurement:
1-point offset calibration for adjusting to a known standard.
Supports both relative and absolute millivolt modes for reliable ORP measurement.
Ion Concentration (For PH-930):
2 to 5 points calibration with 8 selectable concentration points.
Direct ion concentration readout for simplified operation.
Automatic electrode diagnosis displays calibration points and slopes.
Selectable units: ppm, mg/L, mol/L, mmol/L, and ionic valency.
General Features:
Auto-Read function detects and locks the measurement endpoint.
Setup menu allows customization of calibration points, buffer sets, resolution, temperature unit, date/time, and stability criteria.
Reset function restores the system to factory defaults.
Expanded memory stores or recalls up to 500 data sets.
USB communication interface supports data transfer and timed interval readings.

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