VIKING-PH400 Laboratory pH/mV Meter
Overview — VIKING-PH400 laboratory pH meter
High-precision benchtop pH/mV meter with ±0.002 pH accuracy, 0.001 pH resolution, 1–5-point calibration (standard recognition), ATC/MTC, multi-reading modes and GLP-compliant data storage.
0.001 pH resolution
±0.002 pH accuracy
ATC/MTC temperature compensation
- Multi-reading: auto-read (fast/medium/slow), timed and continuous
- Auto-hold endpoint detection
- Automatic electrode diagnosis (slope & offset)
Key features
- 7.0″ high-resolution LCD with backlight for clear visibility.
- 1–5-point calibration with automatic standard recognition (NIST, DIN, GB, USA, MERCK, GOST).
- ATC/MTC ensures accurate results across changing temperatures.
- Auto-hold locks the endpoint; stability prompts (Reading / Stable / Locked).
- GLP storage — up to 500 results; date/time stamping and data recall.
- USB or RS-232 communication; optional printer support.
- Factory reset restores default settings.
- IP54 splash/dust protection.
Typical applications
- Water & wastewater labs (drinking, process, effluent)
- Food & beverage QC, dairy, agriculture
- Pharma & biotech buffers, process control
- Education & research laboratories
Technical specifications
| pH range | −2.000 to 20.000 pH |
|---|---|
| pH resolution | 0.1, 0.01, 0.001 pH |
| pH accuracy | ±0.002 pH |
| Calibration points | Up to 5; automatic standard recognition |
| Buffer groups | NIST, DIN, GB, USA, MERCK, GOST (selectable) |
| mV (ORP) range | −2000.00 to 2000.00 mV |
| mV resolution | 0.1, 0.01 mV |
| mV accuracy | ±0.1 mV or ±0.03% |
| Temperature range | −10.0 to 135.0 °C (14.0 to 275.0 °F) |
| Temperature unit | °C, °F |
| Temperature resolution | 0.1 |
| Temperature accuracy | ±0.1 °C |
| Reading modes | Auto-read (fast/medium/slow), timed, continuous |
| Reading prompts | Reading, Stable, Locked |
| Temperature compensation | ATC, MTC |
| Data storage | 500 results (GLP-compliant) |
| GLP features | Yes |
| pH electrode input | BNC (Q9) |
| Temperature probe input | 4-pin aviation connector |
| Outputs | USB (PC), RS-232 (printer/PC) |
| Backlight | Yes |
| Auto shutdown | 1–60 min, off |
| IP rating | IP54 |
| Date & time | Yes |
| Power | AC adapter, 100–240 V AC input, DC 20 V output |
| Dimensions (instrument) | 242 × 195 × 68 mm |
| Net weight | 900 g (1.98 lb) |
| Carton dimensions | 370 × 305 × 330 mm |
| Shipping weight | 3 kg |
What’s in the box
- Instrument VIKING-PH400
- 3-in-1 pH composite electrode
- EHO-5 electrode stand
- NIST pH buffer solutions (4.01, 7.00, 10.01; 50 mL each)
- AC adapter
- Quick start guide
*Kit contents may vary by configuration.
Compliance & GLP
Automatic buffer recognition, calibration record, date/time-stamped data and PC export support routine QA/GLP workflows.
Electrode options
General-purpose glass, low-temperature, low-ionic strength, TRIS-compatible and spear-tip electrodes.
Service & support
Local calibration, replacement electrodes and buffers available from COLO-Science.
FAQ
How many calibration points are supported?
Up to 5 calibration points with automatic standard recognition.
Does it measure ORP?
Yes. mV mode covers ±2000 mV with an optional ORP electrode.
Is temperature compensation automatic?
Yes. ATC is built in; MTC is also available when needed.
Can I select different buffer groups?
Yes — NIST, DIN, GB, USA, MERCK and GOST buffer sets are selectable.
Downloads
” target=”_blank” rel=”noopener”>VIKING-PH400 Datasheet (PDF)
Request a quote
Tell us your application (sample type, temperature range, expected pH range, required accuracy) — we’ll propose the best electrode and buffer set.
SKU: PRO6085 • Category: pH Meters • Tags: benchtop, pH, ORP, ATC, laboratory
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