1. Application :
- Measurement of pH, acidity, or alkalinity in aqueous solutions
- Widely used in chemical, pharmaceutical, food, dairy, and water testing laboratories
- Suitable for research, quality control, environmental testing, and educational purposes
- Can measure pH of liquids, buffers, soil suspensions, and beverages
2. Compliance Standard :
- ISO 9001 certified manufacturing
- CE / RoHS certified
- ASTM D1293 (for pH measurement in water and aqueous solutions)
- EPA / ISO 10523 standards (laboratory and industrial use)
- GLP-compliant for laboratory quality assurance
3. Product Description :
A Digital pH Meter is an electronic device for accurate pH measurement, consisting of:
- pH-sensitive electrode (glass or combination electrode)
- Digital display for readings in pH, mV, or temperature
- Automatic or manual temperature compensation
- Calibration functions (1–5 points)
- Portable or benchtop models available
Features include fast response, auto shut-off, and memory for calibration data.
4. Technical Specifications
|
Parameter |
Specification |
|
Measurement Range |
pH 0–14 |
|
Resolution |
0.01 pH |
|
Accuracy |
±0.01 to ±0.02 pH |
|
Temperature Range |
0–100°C (depending on model) |
|
Temperature Compensation |
Manual or Automatic (ATC) |
|
Display |
LCD digital display, sometimes with backlight |
|
Electrode Type |
Glass combination pH electrode |
|
Calibration |
1–5 points using standard buffer solutions |
|
Power Supply |
4 × 1.5 V AA batteries or 220V AC adapter (benchtop) |
|
Response Time |
≤ 5 seconds |
|
Housing Material |
ABS / Plastic / Waterproof casing (IP65 models) |
|
Memory |
Optional for storing calibration data |
5. Apparatus is Supplied
- Digital pH meter (portable or benchtop)
- pH electrode / combination electrode
- Standard buffer solutions (pH 4.01, 7.00, 10.00)
- Electrode storage solution
- User manual / calibration certificate
- Protective carrying case (portable models)
6. Optional Accessories
- Replacement pH electrodes (specialized, e.g., high-temperature or low ionic strength)
- Electrode holder or stand
- Calibration buffer kits
- Stirrer for solutions
- PC interface cable and software for data logging
7. Common Capacities / Models Available
- Portable handheld pH meters: pH 0–14, 0–100°C, ATC
- Benchtop pH meters: pH 0–14, multiple electrode inputs, data logging
- Laboratory multiparameter meters: pH + mV + temperature + conductivity
8. Dimensions & Weight (Approx.)
|
Model |
Dimensions |
Approx. Weight |
|
Portable handheld |
200 × 50 × 25 mm |
150–200 g |
|
Benchtop |
250 × 180 × 100 mm |
800–1200 g |
|
Multiparameter |
300 × 200 × 150 mm |
1.5–2 kg |
9. Safety & Handling
- Avoid immersing the electrode in non-aqueous solutions
- Store electrode in storage solution when not in use
- Rinse with distilled water between measurements
- Do not apply excessive force to the glass electrode
- Use proper calibration buffers to maintain accuracy