COLO.Science — WATER QUALITY / ELECTROCHEMISTRY — VIKING-PH400
VIKING-PH400 Laboratory pH/mV Meter
VIKING-PH400 laboratory pH/mV meter is a reliable benchtop instrument for
pH, mV, ORP and temperature measurement. With a 7.0″ high-resolution LCD,
±0.002 pH accuracy, 0.001 pH resolution, 1–5 point calibration,
ATC/MTC temperature compensation, GLP-compliant data storage and USB / RS-232 communication,
VIKING-PH400 is suitable for routine laboratory work, water quality testing, food and beverage QC,
pharmaceutical laboratories, teaching laboratories and general electrochemical measurement workflows.
pH / mV / ORP
7.0″ LCD
±0.002 pH
1–5 point calibration
GLP memory
SKU PRO6085
COLO.SCIENCE — BENCHTOP WATER QUALITY / ELECTROCHEMISTRY METERS
Laboratory pH/mV meter for routine pH, ORP and temperature workflows
The VIKING-PH400 laboratory pH/mV meter is designed for laboratories that need stable, repeatable and well-documented pH and mV measurement. It supports pH, mV / ORP and temperature in one structured benchtop platform with a clear 7.0″ LCD, ATC/MTC temperature compensation, guided calibration and electrode diagnostics.
This laboratory pH/mV meter is suitable for routine water testing, environmental analysis, industrial quality control, food and beverage acidity checks, research applications and teaching laboratories where reliability, traceability and simple operation are important.
Key features
- Benchtop laboratory pH/mV meter for pH, mV / ORP and temperature measurement.
- 7.0″ high-resolution LCD with backlight for clear measurement display.
- pH range −2.000 to 20.000 with 0.1 / 0.01 / 0.001 pH resolution.
- pH accuracy ±0.002 pH for routine laboratory workflows.
- 1–5 point calibration with NIST, DIN, GB and USA buffer groups.
- GLP-compliant memory for 500 results with USB / RS-232 communication.
Suitable for
- Routine laboratory pH and mV / ORP measurements.
- Water quality laboratories and wastewater testing.
- Food, beverage and fermentation quality control.
- Education, university and teaching laboratories.
- Industrial QC laboratories requiring reliable pH measurement.
- Laboratories that need simple GLP-style data handling and clear display.
TECHNICAL SPECIFICATIONS — VIKING-PH400 LABORATORY PH/MV METER
| Model | VIKING-PH400 |
| SKU | PRO6085 |
| pH range | −2.000 to 20.000 pH |
| pH resolution | 0.1 / 0.01 / 0.001 pH |
| pH accuracy | ±0.002 pH |
| pH calibration | 1–5 points |
| Buffer groups | NIST, DIN, GB, USA, MERCK, GOST |
| Custom buffers | Yes |
| Electrode diagnostics | Slope and offset |
| mV range | −2000.00 to 2000.00 mV |
| mV resolution | 1 / 0.1 / 0.01 mV |
| mV accuracy | ±0.1 mV or ±0.03 % of reading |
| Temperature range | −10 to 135 °C / 14 to 275 °F |
| Temperature resolution | 0.1 |
| Temperature accuracy | ±0.1 °C |
| Temperature compensation | ATC / MTC |
| Reading modes | Auto (fast / medium / slow), timed, continuous |
| Reading prompts | Reading, Stable, Locked |
| Endpoint | Auto-Hold |
| Display | 7.0″ LCD with backlight |
| Data memory | 500 results per parameter, GLP |
| Date and time | Yes |
| Inputs | BNC (Q9), 4-pin temperature, banana reference |
| Outputs | USB (PC), RS-232 (printer) |
| Auto power-off | 1–60 min or off |
| Power supply | AC adapter, DC 20 V |
| Protection | IP54 |
| Dimensions | 242 × 195 × 68 mm |
| Weight | approx. 900 g |
Final measurement performance depends on electrode type, probe condition, calibration buffers, sample matrix,
temperature compensation settings and laboratory method. Electrode and accessory compatibility should be confirmed before quotation.
Calibration, electrode diagnostics and GLP data management
Routine pH calibration
VIKING-PH400 supports 1–5 point pH calibration with NIST, DIN, GB and USA buffer groups.
This allows laboratories to use familiar calibration standards for routine pH workflows.
Electrode diagnostics
Electrode slope and offset display help users monitor electrode condition, calibration quality
and measurement readiness during daily laboratory operation.
GLP data handling
The instrument stores up to 500 results and supports data output via USB and RS-232,
making it practical for routine traceable laboratory documentation.
COLO.SCIENCE VIDEO
VIKING-PH400 product video demonstration
It shows installation, parameter settings, calibration and measurement.
VIKING-PH400 operation video: installation, parameter settings, calibration and measurement (4:51). Open the video in a new window
ELECTRODES AND ACCESSORIES
Electrodes and accessories for the VIKING-PH400 laboratory pH/mV meter
The VIKING-PH400 laboratory pH/mV meter is delivered with the 3-in-1 electrode E-301-QC (pH + temperature), pH buffers 4.01 / 7.00 / 10.01 and the electrode stand COLO-5. For special samples choose a dedicated electrode — BNC (Q9) electrodes connect directly, S7-head electrodes connect by cable.
PRO4153
3-in-1 pH composite electrode E-301-QC
pH + reference + temperature in one body; Ag/AgCl, 0–14 pH, BNC (Q9) and 4-pin connector.
Standard delivery
PRO6122
pH buffer set 4.01 / 7.00 / 10.01
Standard pH buffer solutions, 50 mL each, for 3-point calibration.
Standard delivery
COLO-5
Electrode stand COLO-5
Flexible electrode arm with 360° rotation; holds the electrode above the beaker.
Standard delivery
PRO6137
pH electrode E-201-Z, spear tip
Piercing tip for semi-solid samples; Ag/AgCl, Φ12×120 mm, BNC (Q9) — connects directly.
Optional
PRO6144
pH electrode, blade spear (knife)
Knife-shaped POM / 316 stainless steel body for cheese, meat and fruit; S7 head, connected by cable.
Optional
PRO6138
pH electrode E-201-P, flat surface
Flat sensing membrane for surface pH on paper, leather, agar and skin; BNC (Q9) — connects directly.
Optional
PRO6146
pH electrode, slender
Thin Φ6×100 mm shaft for small vessels and test tubes; S7 head, connected by cable.
Optional
PRO6147
pH electrode, long
Long Φ12×260 mm shaft for deep containers and bottles; S7 head, connected by cable.
Optional
More electrodes and accessories
- PRO6995 — 3-in-1 pH electrode, Premium Longlife
- PRO6996 — 3-in-1 pH electrode for ultrapure water
- PRO6997 — 3-in-1 pH electrode, high temperature
- PRO6126 — 3 M KCl electrolyte, 250 mL
- PRO6998 — Thermal printer 771000
Tell us your sample and we will confirm the right electrode for your VIKING-PH400 laboratory pH/mV meter. Full electrode range: Electrochemistry catalogue →
COLO.SCIENCE KNOWLEDGE
Learn more about laboratory pH and ORP measurement
Explore COLO.Science resources covering pH meters, ORP measurement, electrode care, buffer selection
and routine water quality measurement workflows.
Applications and laboratory value
Water quality laboratories
VIKING-PH400 is suitable for routine pH and ORP measurement in drinking water,
wastewater, surface water and process water testing.
Food and beverage QC
Useful for acidity control, fermentation monitoring, raw material control and quality assurance workflows
where stable pH measurement is required.
Teaching laboratories
Clear display, simple operation and standard pH calibration make VIKING-PH400 practical for university,
training and educational laboratories.
Industrial QC and routine labs
GLP-style data memory, USB / RS-232 output and electrode diagnostics support routine quality control
and documented laboratory measurement.
How to choose the correct pH electrode and configuration
When selecting the VIKING-PH400 laboratory pH/mV meter, the electrode should be chosen according to
sample type, expected pH range, temperature, chemical compatibility, junction type and whether temperature
compensation is required. Routine aqueous samples, food samples, low ionic strength samples and aggressive
chemical matrices may require different electrode designs.
COLO.Science can support the selection of pH electrodes, ORP electrodes, temperature probes, calibration buffers,
storage solutions and accessories so that the final configuration matches the laboratory method and quotation.
VIKING-PH400 laboratory pH/mV meter for routine precision measurement
The VIKING-PH400 laboratory pH/mV meter is useful when a laboratory needs a reliable benchtop
instrument with clear display, straightforward calibration and stable performance for daily pH and mV / ORP measurement.
The combination of ±0.002 pH accuracy, 1–5 point calibration, 500-result data memory
and USB / RS-232 output supports practical routine laboratory workflows.
In practice, pH measurement quality depends not only on the meter but also on electrode condition, buffer quality,
sample preparation, temperature compensation and correct storage of the pH electrode. VIKING-PH400 provides a robust
measurement platform, while COLO.Science can help define the correct electrode and accessory set for the final application.
Configuration notice
pH/mV meters may be delivered in different configurations depending on selected electrodes, temperature probes,
calibration solutions and accessories. The official quotation defines the final scope of supply. Website content
is provided for general product presentation and may not represent the exact delivered configuration.
Specifications may change without notice.
Sales and support for international customers
COLO Lab ExpertsPolje ob Sotli 4, SI-3255 Buče, Slovenia
Phone: +386 70 713 437 · Email: sales@colo.si · Web: colo.si
We supply laboratories across Europe directly and through partners. B2B prices are quoted net, excluding VAT.
