VIKING-PH200 — Benchtop pH Meter
OVERVIEW
The VIKING-PH200 benchtop pH meter combines a bright 6.0″ backlit LCD with simple operating logic for routine pH and mV measurements. It supports Auto-Read and continuous read modes with Auto-Hold endpoint detection, ATC/MTC temperature compensation and 1–3 point pH calibration with NIST buffer recognition.
With 50 data sets per parameter, clear status prompts (Reading / Stable / Locked), IP54 splash protection and universal AC adapter, VIKING-PH200 is a practical, cost-effective platform for education, COLO.Science water quality routines and general benchtop pH/mV tasks.
COLO.SCIENCE KNOWLEDGE
Fundamentals of routine pH measurement
Explore COLO.Science articles on pH theory, NIST buffer selection, electrode care and good practice in water quality, education and food & beverage QA/QC workflows.
Typical Applications
Environmental Monitoring
Food & Beverage QA/QC
Education & Training
General Benchtop pH / mV
Industrial Process Control
Model & Parameters
| Model | Measured parameters | Display & operation |
|---|---|---|
| VIKING-PH200 | pH, mV, temperature; 1–3 point pH calibration with automatic NIST buffer recognition; ATC and MTC temperature compensation. | 6.0″ high-resolution LCD with backlight; status prompts (Reading / Stable / Locked); Auto-Read and continuous reading modes with Auto-Hold endpoint. |
Technical Specifications (VIKING-PH200)
| Parameter | Specification |
|---|---|
| pH | Range: −2.00 to 18.00 pH · Resolution: 0.01 pH · Accuracy: ±0.01 pH · Calibration: up to 3 points, NIST buffer recognition |
| mV | Range: −1999 to 1999 mV · Resolution: 1 mV · Accuracy: ±0.1% FS · Suitable for ORP and general redox measurements |
| Temperature | Range: −5 to 110 °C · Resolution: 0.1 °C · Accuracy: ±0.2 °C · ATC and MTC compensation |
| Measurement modes | Auto-Read and Continuous · Status prompts: Reading / Stable / Locked · Auto-Hold endpoint detection |
| Data management | Up to 50 results per parameter · Simple recall for basic GLP documentation |
| Inputs & connectivity | pH electrode: BNC (Q9) · Temperature probe: 4-pin aviation connector |
| Display & housing | 6.0″ LCD with backlight · IP54 splash protection · Auto shutdown: 300 / 600 / 1200 / 1800 / 3600 s (or off) |
| Power & dimensions | AC adapter: 100–240 V input / DC 9 V output · Dimensions: 242 × 195 × 68 mm · Weight: 900 g |
Note: For the complete specification table, please refer to the VIKING-PH200 datasheet (PDF).
Standard Delivery
- 3-in-1 pH composite electrode PRO4153 (or equivalent)
- NIST pH buffer solutions 4.01 / 7.00 / 10.01 (50 mL per vial)
- Electrode stand EHO5
- AC adapter (100–240 V AC input, DC 9 V output)
Exact kit contents may vary by configuration and region. Please check the current COLO.Science quotation.
pH Electrode Care & Maintenance
Proper electrode care is one of the most important factors for accurate and reproducible pH measurements. Even a high-quality benchtop pH meter like the VIKING-PH200 will underperform if the electrode is poorly maintained. Following a few simple routines will significantly extend electrode lifespan and keep your readings reliable.
Storage
Always store the pH electrode in 3 M KCl storage solution — never in distilled or deionised water. Dry storage permanently damages the glass membrane and reference junction, leading to slow response and drifting readings.
Rinsing & Cleaning
Rinse the electrode with distilled water between samples and gently blot dry with lint-free tissue — do not rub. For stubborn contamination (proteins, fats, heavy metals), use an appropriate electrode cleaning solution before rinsing.
Calibration Frequency
Calibrate before each measurement session using fresh NIST buffer solutions. The VIKING-PH200 supports 1–3 point calibration with automatic buffer recognition. Always use buffers that bracket the expected sample pH range for best accuracy.
Tip: If the electrode shows slow response, unstable readings or fails calibration, condition it by soaking in 3 M KCl for 30–60 minutes before use. If the problem persists, the electrode may need replacement — COLO.Science can advise on compatible electrodes for the VIKING-PH200.
VIKING-PH200 — Benchtop pH Meter
A practical, cost-effective benchtop pH meter with 6.0″ LCD, ATC/MTC, 1–3 point calibration and IP54 protection — supported by COLO.Science.
COLO.Science · Practical and robust equipment for everyday laboratory workflows.
