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Hanna Instruments HI-6421 Advanced Dissolved Oxygen Benchtop Meter
- Flexible Electrode Arm
- Five Measurement Viewing Modes
- Polarographic or optical probe
SKU
HI-6421/P
The HI-6421 Advanced Benchtop Meter for Dissolved Oxygen measures DO, BOD, OUR, and SOUR in fresh and saltwater samples. It has five unique viewing modes, Ethernet and WiFi connectivity, and an intuitive on-screen tutorial. The meter is available with either an optical dissolved oxygen probe or a polarographic DO probe.
The HI-7641133 Opdo optical dissolved oxygen probe utilises fluorescence quenching technology. It has Smart Caps (HI-764113-1) that lock into place and contain pre-loaded calibration coefficients, automatically transmitting data to the probe. The sensor's reference signal compensates for component ageing.
The HI-764833 polarographic DO probe has a platinum cathode with an Ag/AgCl anode assembly for fast response times independent of flow. The built-in thermistor sensor compensates for temperature variations and is suitable for test tubes and BOD bottles.
A built-in barometer allows for manual or automatic pressure compensation with multiple unit options, including mmHg, mbar, kPa, inHg, psi, and atm. Once a salinity concentration is manually entered, salinity compensation activates automatically.
Key Features
- Advanced Optical DO Measurement
- Smart Caps with Pre-Loaded Calibration
- Space-Saving, Modern Design
- Large Capacitive Touchscreen
- WiFi and Ethernet Connectivity
- Flexible Electrode Arm
- Five Measurement Viewing Modes
- User-Friendly Interface and Customization
- Comprehensive Data Storage (Up to 1M Data Points)
- Remote Data Transfer via FTP, Email, or USB
- Configurable Visual and Audible Alarms
- USB A & USB C for Easy Export and Peripheral Support
- Built-in Video and Text Tutorials
- Automatic Temperature, Salinity, and Pressure Compensation
- Opdo optical dissolved oxygen probe (HI-6421-02)
- High-Performance Polarographic DO Probe Option (HI-6421P-02)
- Slim, Test Tube-Compatible Probe for Versatile Use
- Built-in OUR, SOUR, and BOD Calculations
- Customizable User Accounts and Permissions
- Store up to one million data points with timestamps
- Export the data in .csv format
What's Included?
- HI-6421-02
- Benchtop Meter
- HI-7641133 optical dissolved oxygen probe (OPDO)
- HI-764060 electrode holder
- Capillary pipette
- 24 VDC power adapter
- USB-C to USB-A cable
- Probe quality certificate
- Quick reference guide
- Instrument quality certificate
- HI-6421P-02
- Benchtop Meter
- HI-764833 polarographic probe
- HI-764060 electrode holder
- Capillary pipette
- 24 VDC power adapter
- USB-C to USB-A cable
- Probe quality certificate
- Quick reference guide
- Instrument quality certificate
Product Range
- Hanna Instruments HI-6421-02 Advanced Dissolved Oxygen Benchtop Meter with Optical DO Probe
- Hanna Instruments HI-6421P-02 Advanced Dissolved Oxygen Benchtop Meter with Polarographic DO Probe
Technical Information
Specification
| HI-6421 - DO (HI-7641133 Optical probe) | HI-6421P - DO (HI-764833 Polarographic probe) | |
|---|---|---|
| Range | 0.00 to 50.00 mg/L (ppm) concentration; 0.0 to 500.0 % saturation | 0.00 to 90.00 mg/L (ppm) concentration; 0.0 to 600.0 % saturation |
| Resolution | 0.01 mg/L (ppm); 0.1 % saturation | |
| Accuracy | from 0.00 to 20.00 mg/L (ppm) 1.5 % of reading or ±0.01 mg/L (ppm), whichever is greater from 20.00 to 50.00 mg/L (ppm) ±5 % of reading from 0.0 to 200.0 % saturation ±1.5 % of reading or ±0.1 %, whichever is greater from 200.0 to 500.0 % saturation ±5 % of reading |
±1.5 % of reading ±1, least significant digit |
| Barometric Pressure | ||
| Range | 450 to 850 mmHg; 600 to 1133 mBar; 60 to 133 kPa; 17 to 33 inHg; 8.7 to 16.4 psi; 0.592 to 1.118 atm |
|
| Resolution | 1 mmHg; 1 mBar; 1 kPa; 1 inHg; 0.1 psi; 0.001 atm | |
| Accuracy | ±3 mmHg within ±15 % from the calibration point ±3 mmHg ±1 least significant digit |
|
| Temperature | ||
| Range | −20.0 to 120.0 °C −4.0 to 248.0 °F 253.0 to 393.0 K |
|
| Resolution | 0.1 °C; 0.1 °F; 0.1 K | |
| Accuracy | ±0.2 °C; ±0.4 °F; ±0.2 K | |
| DO Calibration | ||
| Points | DO optical One or two points automatic calibration at 100% (8.26 mg/L) and 0% (0 mg/L). Single point manual using a value entered by the user in % saturation or mg/L. DO polarographic Automatic two points / User standard single point |
|
| Standards | 0 and 100% saturation | |
| Reminder | Disabled Daily: 0 min. to 23 hours and 59 min. Periodic: 1 min. to 500 days, 23 hours and 59 minutes. |
|
| Temperature Compensation | Automatic or Manual | |
| Salinity Compensation (Optical DO only) | Automatic from 0 to 70 PSU (manually set) 0.0 to 70.0 % / 0.0 to 45.0 g/L / 0.0 to 42.0 psu |
- |
| Reading | ||
| Modes | Direct Direct/Autohold |
|
| Stability criteria | Accurate Medium Fast |
|
| Isopotential | 7.000 or 4.010 | |
| Sampling rate | 1000 ms | |
| DO Views | ||
| Basic | Measurement (DO, Temperature) Stability status |
|
| Simple GLP | Basic view information Last calibration date, offset, average slope |
|
| Full GLP | Simple GLP information and calibration point details | |
| Table | Measurements updated every second are displayed in the table | |
| Graph (Plot) | Measurement versus time graph can be panned or zoomed (pinch-to-zoom technology) | |
| Logging | ||
| Type | Automatic, Manual, Autohold | |
| Number of records | 50,000 maximum per file Stores at least 1,000,000 data points per user |
|
| Automatic interval | 1, 2, 5, 10, 30 seconds 1, 2, 5, 10, 15, 30, 60, 120, 150, 180 minutes |
|
| Sample ID | Incremental mode | |
| Export option | .csv file format | |
| Users | Up to 9 users and the default administrator account | |
| Connectivity | ||
| USB-A | 2 ports for keyboard input or USB thumb drive | |
| USB-C | 1 port for PC connectivity and a USB-C type thumb drive | |
| Wi-Fi & Ethernet | FTP Web server Log transfer and download |
|
| RS232 | Connecting peripherals | |
| Power supply | DC adapter 100-240AC to 24VDC 2.5A | |
| Environment | 0 - 50 °C / 32 - 122 °F / 273 - 323 K maximum 95% RH non-condensing | |
| Dimensions | 205 x 160 x 77 mm (8.0 x 6.2 x 3.0 “) | |
| Weight | Approximately 1.2 kg (26.5 lbs.) | |
Document Downloads
Hanna Instruments HI-6421 Advanced Dissolved Oxygen Meter User Manual
Hanna Instruments HI-6421 Advanced Dissolved Oxygen Meter Brochure
Additional Information
SKU
HI-6421/P
Hanna Instruments HI-6421 Advanced Dissolved Oxygen Benchtop Meter
£1,290.00
£1,548.00 inc vat
£1,290.00
£1,548.00 inc vat