VIKING-PH400 pH/mV meter — Benchtop · 5.7″ LCD
OVERVIEW
VIKING-PH400 pH/mV meter is a reliable benchtop instrument designed for routine pH and ORP measurements in water quality, food & beverage, pharmaceutical, and educational laboratories. This VIKING-PH400 pH/mV meter features a 5.7″ high-resolution LCD with backlight, ±0.01 pH accuracy, and 1–5 point calibration with automatic buffer recognition (NIST, DIN, GB, USA).
With ATC/MTC temperature compensation, multiple reading modes (Auto Read, Timed, Continuous), Auto-Hold endpoint detection, GLP-compliant data storage for 500 results, and USB/RS-232 interfaces, the VIKING-PH400 pH/mV meter is a versatile COLO.Science platform for routine laboratory workflows.
VIKING-PH400 pH/mV meter is a reliable benchtop instrument featuring a 5.7″ high-resolution LCD for clear measurement display. This VIKING-PH400 pH/mV meter combines ±0.01 pH accuracy, 1–5 point calibration with multiple buffer groups (NIST, DIN, GB, USA), GLP data storage for 500 results and straightforward operation for routine laboratory work.COLO.Science · Practical and robust equipment for everyday laboratory workflows.
COLO.SCIENCE KNOWLEDGE
Best practice for laboratory pH and ORP measurement
Explore COLO.Science articles on pH theory, buffer selection, electrode care, ORP measurement and GLP-compliant pH workflows in water, food and pharmaceutical laboratories.
Product Overview
VIKING-PH400 pH/mV meter is built for laboratories that need a reliable pH/mV meter with straightforward operation. The 5.7″ high-resolution LCD with backlight ensures easy reading, and the multi-point calibration (up to 5 points) with automatic buffer recognition supports typical pH measurement tasks.
Configuration notice — delivery depends on selected options
pH/mV meters may be delivered in different configurations depending on the application and selected accessories. The official PDF technical specification defines the exact configuration, included components and available options for each model/variant. Content shown on this website is provided for general informational purposes only and may not represent the final delivered configuration. Specifications may change without notice.
Key Features
5.7″ High-Resolution LCD
±0.01 pH Accuracy
0.01 pH Resolution
1–5 Point Calibration
NIST/DIN/GB/USA Buffers
ATC / MTC
GLP Data (500 results)
USB & RS-232
Electrode Diagnostics
Auto-Hold Endpoint
IP54 Protection
Measurement
Reliable pH & mV Measurement for Routine Lab Work
Straightforward Operation
Clear display and simple controls for routine pH and mV measurements. The VIKING-PH400 pH/mV meter requires no complex configuration.
5.7″ High-Resolution LCD
The backlit display provides clear readouts, even in low-light laboratory conditions.
Flexible Reading Modes
Auto-read (Fast/Medium/Slow), timed and continuous modes with auto-hold endpoint detection and status prompts (Reading/Stable/Locked).
pH Measurement
- Range: -2.00 to 20.00 pH
- Resolution: 0.1 / 0.01 pH
- Accuracy: ±0.01 pH
- Calibration: 1–5 points with NIST/DIN/GB/USA buffers
- Standard customization supported
- Electrode slope & offset display
mV / ORP Measurement
- Range: -2000.0 to 2000.0 mV
- Resolution: 0.1 mV
- Accuracy: ±0.3 mV or ±0.1% FS
- Suitable for ORP and redox measurements
- Reading prompts: Reading, Stable, Locked
Temperature & Data Management
- Temperature range: -5 to 110 °C / 23 to 230 °F
- Resolution: 0.1 °C/°F, Accuracy: ±0.2 °C
- ATC / MTC compensation
- Data storage: 500 results (GLP-compliant)
- USB (PC) and RS-232 (printer) interfaces
Technical Specifications (VIKING-PH400)
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Model | VIKING-PH400 pH/mV meter | Product number | PRO6085 |
| Parameters | pH, mV (ORP), Temperature | Display | 5.7″ high-resolution LCD, backlight |
| pH range | -2.00 to 20.00 pH | pH resolution | 0.1 / 0.01 pH |
| pH accuracy | ±0.01 pH | Calibration points | Up to 5 (1–5 points) |
| Buffer groups | NIST, DIN, GB, USA (customizable) | Electrode diagnostics | Slope & offset display |
| mV range | -2000.0 to 2000.0 mV | mV resolution | 0.1 mV |
| mV accuracy | ±0.3 mV or ±0.1% FS | Temperature range | -5 to 110 °C / 23 to 230 °F |
| Temp. resolution | 0.1 °C/°F | Temp. accuracy | ±0.2 °C |
| Reading modes | Auto-Read (F/M/S), Timed, Continuous, Auto-Hold | Reading prompts | Reading, Stable, Locked |
| Data storage | 500 results (GLP-compliant) | Temperature compensation | ATC, MTC |
| pH electrode input | BNC (Q9) | Temp. probe input | 4-pin aviation connector |
| Outputs | USB (PC), RS-232 (printer) | Auto shutdown | 1–60 min, off |
| IP rating | IP54 | Power | AC adapter 100-240V / DC 9V output |
| Dimensions | 242 × 195 × 68 mm | Weight | 900 g (1.98 lb) |
Note: If VIKING-PH400 does not match your application needs, COLO.Science can propose an appropriate technical solution. Specifications may change over time.
VIKING Series — Model Comparison
Compare COLO benchtop pH/mV meters by display, accuracy, calibration points, data storage and key features. The VIKING-PH400 pH/mV meter offers an excellent balance of performance and value for routine laboratory use.
| Parameter | VIKING-PH200 | VIKING-PH400 | VIKING-PH500 | VIKING-PH600 |
|---|---|---|---|---|
| Display | 6.0″ LCD | 5.7″ LCD | 7.0″ color touchscreen | 7.0″ color touchscreen |
| pH accuracy | ±0.01 pH | ±0.01 pH | ±0.002 pH | ±0.002 pH |
| Calibration points | 1–3 | 1–5 | 1–6 | 1–6 |
| Buffer groups | NIST | NIST, DIN, GB, USA | 6 groups + custom | NIST/DIN/GB + custom |
| Data storage | 50 results | 500 results | 1000 groups | 1000 groups/param |
| Interfaces | — | USB, RS-232 | USB, RS-232 | USB, RS-232 |
| Protection class | IP54 | IP54 | IP54 | IP54 |
VIKING-PH400 — Benchtop pH/mV Meter · 5.7″ LCD
VIKING-PH400 pH/mV meter is ideal when you need a reliable benchtop pH/mV meter with clear display, ±0.01 pH accuracy, 1–5 point calibration and GLP data management — supported by COLO.Science.
COLO.Science · Practical and robust equipment for everyday laboratory workflows.
