Overview — VIKING-DO400 laboratory DO meter
VIKING-DO400 is a bench-top dissolved oxygen meter designed for high-confidence measurements in water & wastewater, environmental labs, aquaculture and education. It offers a bright 7.0″ LCD, Auto-Read / Timed / Continuous reading modes, automatic/manual temperature compensation, auto-hold endpoint detection and GLP-compliant data storage (500 results per parameter). The instrument supports calibration in air-saturated water or zero oxygen, with auto barometric compensation and manual salinity factor correction.
Key features
- 7.0″ high-resolution LCD display with backlight.
- Multi-reading: Auto-Read, Timed-Read, Continuous-Read.
- Automatic/Manual temperature compensation (ATC/MTC).
- Auto-hold endpoint detection with “Reading/Stable/Locked” prompts.
- GLP data storage: 500 results per parameter with date/time.
- USB (PC) and RS-232 (printer) connectivity.
- Factory reset to default settings.
- IP54 splash/dust protection.
- Calibration in air-saturated water or zero O2.
- Automatic barometric pressure compensation.
- Manual salinity factor correction.
- Selectable pressure units: kPa, mbar, Torr, Atm.
Included in the box
- Polarographic DO electrode PRO6163 (zero oxygen calibration solution, DO electrolyte, 3× membrane caps)
- Electrode stand EHO-5
Technical specifications
| Model |
VIKING-DO400 |
| Parameters |
Dissolved Oxygen / Temperature (DO Saturation) |
Dissolved Oxygen — Concentration
| Sensor Type |
Polarographic |
| Range |
0.00–99.99 ppm |
| Resolution |
0.01 ppm |
| Accuracy |
±0.10 ppm (0.00–50.00), ±0.50 ppm (50.0–99.99) |
| Calibration Points |
Air-saturated water or zero point |
| Barometric Compensation |
Yes |
| Manual Salinity Factor Correction |
Yes |
Dissolved Oxygen — Saturation
| Range |
0.0–600.0 % |
| Resolution |
0.1 % |
| Accuracy |
±2.0 % |
Temperature
| Range |
−10.0 to 135.0 °C, 14.0 to 275.0 °F |
| Unit |
°C, °F |
| Resolution |
0.1 |
| Accuracy |
±0.1 °C |
Measurement
| Reading Mode |
Auto Read (Fast, Medium, Slow), Timed, Continuous |
| Reading Prompts |
Reading, Stable, Locked |
| Temp. Compensation |
ATC, MTC |
Data management
| Data Storage |
500 results each |
| GLP Features |
Yes |
Inputs & outputs
| DO with Temp. Probe |
4-pin aviation connector |
| USB |
PC |
| RS-232 |
Printer |
Display & power
| Backlight |
Yes |
| Auto Shutdown |
1–60 min; Off |
| IP Rating |
IP54 |
| Date & Time |
Yes |
General
| Power |
AC adapter, 100–240 V AC input, DC 20 V output |
| Dimensions |
242 × 195 × 68 mm |
| Net Weight |
900 g (1.98 lb) |
| Dimensions (Carton) |
370 × 320 × 220 mm |
| Shipping Weight |
2.5 kg |
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