COLO.Science — Water Quality / Dissolved Oxygen — VIKING-DO400
VIKING-DO400 laboratory DO meter
VIKING-DO400 laboratory DO meter is a benchtop dissolved oxygen instrument for
DO concentration, DO saturation and temperature measurement in water and wastewater laboratories,
environmental monitoring, aquaculture, education and routine water-quality control. The meter combines a
7.0″ high-resolution LCD, Auto-Read / Timed / Continuous reading modes,
automatic and manual temperature compensation, GLP data storage,
automatic barometric compensation and manual salinity correction for reliable dissolved oxygen workflows.
| Overview | Video soon | RFQ |
COLO.Science — Benchtop Water Quality / Dissolved Oxygen Instruments
Benchtop dissolved oxygen meter for DO concentration, DO saturation and temperature
The VIKING-DO400 laboratory DO meter is designed for high-confidence dissolved oxygen
measurement in water-quality laboratories, wastewater testing, environmental analysis, aquaculture and
education. It measures dissolved oxygen concentration from 0.00 to 99.99 ppm,
DO saturation from 0.0 to 600.0% and temperature from −10.0 to 135.0 °C.
The instrument supports air-saturated water or zero oxygen calibration, automatic barometric pressure
compensation, manual salinity factor correction, GLP data storage and USB / RS-232 connectivity for
practical laboratory reporting workflows.
Key features
- Laboratory DO meter for dissolved oxygen concentration, DO saturation and temperature.
- 7.0″ high-resolution LCD display with backlight for clear bench operation.
- Polarographic DO sensor with 0.00–99.99 ppm DO concentration range.
- DO saturation range 0.0–600.0% with 0.1% resolution.
- Auto-Read, Timed-Read and Continuous-Read measurement modes.
- Automatic/manual temperature compensation, auto-hold endpoint and GLP data storage.
- Automatic barometric compensation and manual salinity factor correction.
- USB for PC, RS-232 for printer and IP54 splash/dust protection.
Suitable for
- Drinking water, wastewater and process-water laboratories.
- Environmental monitoring and dissolved oxygen control.
- Aquaculture, fish farming and biological oxygen monitoring.
- Education, training and laboratory demonstrations of DO measurement.
- Routine QA/QC workflows requiring stable readings and GLP-style records.
- Water-quality applications where barometric and salinity correction are important.
Technical specifications — VIKING-DO400 laboratory DO meter
| Model | VIKING-DO400 |
| SKU | PRO3172 |
| Product type | Benchtop dissolved oxygen / temperature meter |
| Measured parameters | Dissolved Oxygen concentration / DO saturation / Temperature |
| Sensor type | Polarographic DO sensor |
| Display | 7.0″ high-resolution LCD with backlight |
| DO concentration range | 0.00–99.99 ppm |
| DO concentration resolution | 0.01 ppm |
| DO concentration accuracy | ±0.10 ppm from 0.00–50.00 ppm; ±0.50 ppm from 50.0–99.99 ppm |
| DO calibration points | Air-saturated water or zero oxygen point |
| Barometric compensation | Yes, automatic |
| Pressure units | kPa, mbar, Torr, Atm |
| Salinity correction | Manual salinity factor correction |
| DO saturation range | 0.0–600.0% |
| DO saturation resolution | 0.1% |
| DO saturation accuracy | ±2.0% |
| Temperature range | −10.0 to 135.0 °C / 14.0 to 275.0 °F |
| Temperature resolution | 0.1 |
| Temperature accuracy | ±0.1 °C |
| Temperature compensation | Automatic temperature compensation (ATC) / Manual temperature compensation (MTC) |
| Reading modes | Auto-Read Fast / Medium / Slow, Timed-Read, Continuous-Read |
| Reading prompts | Reading / Stable / Locked |
| Endpoint function | Auto-hold endpoint detection |
| Data storage | 500 results per parameter |
| GLP features | Yes, date and time supported |
| DO with temperature probe input | 4-pin aviation connector |
| USB output | PC connection |
| RS-232 output | Printer connection |
| Backlight | Yes |
| Auto shutdown | 1–60 minutes, or off |
| Protection rating | IP54 splash and dust protection |
| Power supply | AC adapter, 100–240 V AC input, DC 20 V output |
| Dimensions / net weight | 242 × 195 × 68 mm · 900 g |
| Carton dimensions / shipping weight | 370 × 320 × 220 mm · 2.5 kg |
Final measurement performance depends on electrode condition, membrane condition, electrolyte, calibration method,
temperature compensation, atmospheric pressure, salinity correction, sample matrix and routine maintenance.
Specifications may change without notice.
Calibration, compensation and GLP data management
Air or zero oxygen calibration
VIKING-DO400 supports dissolved oxygen calibration in air-saturated water or zero oxygen point,
helping laboratories prepare the meter for routine DO concentration and saturation measurements.
Pressure and salinity correction
Automatic barometric pressure compensation and manual salinity factor correction support more reliable
dissolved oxygen readings when sample conditions differ from standard laboratory assumptions.
GLP-oriented records
The instrument stores 500 results per parameter and includes date and time functions, helping laboratories
maintain structured measurement records for QA/QC, training and internal documentation.
COLO.Science video
VIKING-DO400 video presentation is in preparation
The upcoming video can show DO electrode preparation, membrane cap workflow, air/zero calibration,
barometric compensation, salinity correction, reading modes, data storage and practical use in water-quality laboratories.
Standard delivery and dissolved oxygen workflow
Included components
- Polarographic DO electrode PRO6163.
- Zero oxygen calibration solution.
- DO electrolyte.
- Three membrane caps.
- Electrode stand EHO-5.
- AC adapter for benchtop use.
Practical DO measurement workflow
- Prepare DO electrode, electrolyte and membrane cap according to laboratory procedure.
- Perform air-saturated water or zero oxygen calibration.
- Select Auto-Read, Timed-Read or Continuous-Read mode.
- Apply temperature compensation, barometric compensation and salinity correction as needed.
- Store and export measurement records through GLP-oriented data functions.
COLO.Science knowledge
Learn more about water quality and dissolved oxygen measurement
Explore COLO.Science articles about dissolved oxygen, water-quality testing, electrochemical measurement,
calibration routines, laboratory workflow and practical instrument selection.
Applications and laboratory value
Water and wastewater laboratories
VIKING-DO400 supports dissolved oxygen and temperature measurement for routine drinking water, wastewater,
surface-water and process-water testing.
Environmental monitoring
DO concentration and saturation values are important indicators for environmental water monitoring,
biological activity and oxygen availability in aquatic systems.
Aquaculture and biological testing
The meter is suitable for checking dissolved oxygen in aquaculture, fish farming, biological samples
and oxygen-sensitive water-quality processes.
Education and routine QC
The clear display, multiple reading modes and GLP-style data records make the VIKING-DO400 practical
for teaching, training and laboratory QA/QC workflows.
Selecting the right DO meter and accessories
When selecting the VIKING-DO400 laboratory DO meter, the final configuration should match the
expected sample type, salinity, atmospheric pressure conditions, laboratory workflow and reporting requirements.
Polarographic DO measurement also depends on electrode condition, membrane cap quality, electrolyte preparation
and correct calibration practice.
COLO.Science can support selection of DO electrodes, membrane caps, electrolyte, calibration solutions, electrode stands,
accessories and technical documentation so the delivered configuration matches the application and quotation.
VIKING-DO400 laboratory DO meter for dissolved oxygen and temperature measurement
The VIKING-DO400 laboratory DO meter is useful when a laboratory needs one benchtop instrument
for dissolved oxygen concentration, DO saturation and temperature measurement. The combination of a 7.0″ LCD,
polarographic DO sensor, GLP data storage, automatic barometric compensation and manual salinity correction
supports routine water-quality testing in laboratory environments.
For water laboratories, environmental monitoring, wastewater testing, aquaculture and education, VIKING-DO400 provides
a practical measurement platform with multiple reading modes, auto-hold endpoint detection, USB / RS-232 connectivity
and a supplied DO electrode kit for standard dissolved oxygen workflows.
Configuration notice
Laboratory DO meters may be delivered in different configurations depending on selected electrodes, membrane caps,
electrolyte, calibration solutions, electrode stands, accessories and regional availability. The official quotation defines
the final delivery scope. Website content is provided for general product presentation and may not represent the exact
delivered configuration. Specifications may change without notice.
