Portable pH/lon Meter PH-321 Biobase

Portable pH/Ion Meter PH-321 Biobase

The PH-321 Portable pH/Ion Meter by Biobase is a simplified model of the PH-320, designed for accurate ion concentration and ORP measurements in a lightweight, portable design. Unlike the PH-320, this model does not include pH measurement but provides precise ion concentration analysis with optional ion-selective electrodes (ISE), making it suitable for fieldwork, environmental monitoring, and laboratory testing.

Features

ORP Measurement

1. 1-point offset calibration allows adjustment of the displayed value to a known standard.

2. Supports both relative and absolute millivolt modes for reliable ORP analysis.

Ion Concentration Measurement

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

2. Direct ion concentration readout simplifies measurement.

3. Automatic electrode diagnosis displays calibration points and slopes.

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

General Functions

1. Automatic temperature compensation ensures accurate results across the full range.

2. Auto-Read function detects stable values and locks the endpoint automatically.

3. Calibration due alarm reminds the user to recalibrate regularly.

4. Auto-power off (10, 20, or 30 minutes) helps conserve battery life.

5. Setup menu allows configuration of calibration points, resolution, stability criteria, units, date, and time.

6. Reset function restores factory default settings.

7. Expanded memory stores up to 500 data sets for recall.

8. USB communication interface for data transfer to PC.

9. Multi-mode power supply: batteries, power adapter, or USB port.

Optional Ion Selective Electrodes (ISE)

Ammonium (NH₄⁺), Bromide (Br⁻), Cadmium (Cd²⁺), Calcium (Ca²⁺), Chloride (Cl⁻), Cupric (Cu²⁺), Cyanide (CN⁻), Fluoride (F⁻), Iodide (I⁻), Lead (Pb²⁺), Nitrate (NO₃⁻), Potassium (K⁺), Silver (Ag⁺), Sodium (Na⁺), Sulphide (S²⁻), and Ammonia (NH₃).

Applications

1. Field analysis of ion concentrations in environmental monitoring.

2. Aquaculture and agricultural water quality control.

3. Industrial quality control requiring ion concentration testing.

4. Laboratory use for education, research, and chemical analysis.

Technical Specifications

Ion Concentration

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

• 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

ORP

• Range: -1999.9 ~ 1999.9 mV

• Relative mV range: -1999.9 ~ 1999.9 mV

• Resolution: 0.1, 1 mV (selectable)

• Accuracy: ±0.2 mV

• Calibration: 1 point (relative mV mode)

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

• Calibration due alarm: 1 to 31 days or off

• Hold function: manual or auto-endpoint

• Auto-off: 10, 20, or 30 minutes

• Memory: 500 data sets

• Data interface: USB

• Connectors: BNC, 3.5 mm jack socket

• Display: custom LCD (80 × 60 mm)

• Power supply: 3 × 1.5V AA batteries or DC5V adapter

• Battery life: approx. 150 hours (backlight off)

• Dimensions: 170 × 85 × 30 mm

• Net weight: 300 g

• Package size: 475 × 155 × 350 mm

• Gross weight: 2 kg

Accessories Included

1. Ion-selective electrode (ISE, optional based on target ion)

2. Temperature probe

3. Carrying case

Conclusion

The Biobase PH-321 Portable pH/Ion Meter is a practical and efficient solution for ion concentration and ORP measurements in both field and laboratory settings. With multiple calibration options, support for a wide range of ion-selective electrodes, data storage, and USB connectivity, it is an excellent tool for environmental monitoring, industrial testing, and research applications.