Hanna Advanced Dissolved Oxygen Optical Benchtop Meter – HI-6421
| Brand | |
|---|---|
| Model | HI-6421-02 |
| Method | Optical dissolved oxygen, based on luminescence quenching |
| Supplied probe | HI7641133 OPDO optical probe |
| DO range | 0.00–50.00 mg/L; 0.0–500.0% saturation, for the listed optical system |
| Resolution | 0.01 mg/L; 0.1% saturation |
| Replacement cap | HI764113-1 SmartCap |
| Supplied holder | HI764060 electrode holder |
| Supported workflows | DO, BOD, OUR and SOUR |
| Pressure compensation | Built-in barometer |
| Salinity compensation | Uses the manually entered sample salinity |
| Logging | Up to one million data points |
| Connectivity | Wi-Fi, Ethernet and USB connections |
Laboratory optical dissolved-oxygen system with HI7641133 OPDO probe and HI764060 holder. Supports DO, BOD, OUR and SOUR workflows; the matching replacement sensor cap is HI764113-1.
£2,116.29 (inc VAT)
Hanna HI6421 Optical Dissolved Oxygen Meter
The HI6421 is Hanna's optical benchtop dissolved-oxygen system. It is supplied with the HI7641133 OPDO probe and supports DO measurements together with the instrument's BOD, OUR and SOUR calculation workflows.
The optical sensor uses a SmartCap system rather than a polarographic membrane filled with electrolyte. That difference matters when choosing replacement parts and planning routine servicing.
Technical overview
| Specification | Details |
|---|---|
| Measurement system | Optical dissolved oxygen, based on luminescence quenching |
| Supplied probe | HI7641133 OPDO optical probe |
| DO range | 0.00–50.00 mg/L; 0.0–500.0% saturation, for the listed optical system |
| Resolution | 0.01 mg/L; 0.1% saturation |
| Replacement cap | HI764113-1 SmartCap |
| Supplied holder | HI764060 electrode holder |
| Supported workflows | DO, BOD, OUR and SOUR |
| Temperature compensation | Automatic |
| Pressure compensation | Built-in barometer |
| Salinity compensation | Uses the manually entered sample salinity |
| Logging | Up to one million data points |
| Connectivity | Wi-Fi, Ethernet and USB connections |
What is supplied?
Hanna's standard list includes the HI7641133 optical probe, HI764060 holder, capillary pipette, 24 V DC power adapter, USB-C to USB-A cable, probe quality documentation and quick reference guide. The holder can be arranged to suit the available bench space.
The probe's optical cap carries the model-specific calibration information. Use the matching HI764113-1 replacement and follow the installation and validation procedure in the probe instructions; it is not interchangeable with a polarographic membrane kit.
Reliable sample measurements and records
Allow the probe to stabilise and follow the sample and probe-cleaning procedure. Keep the sensing surface in the condition specified by Hanna. General pH buffers, pH storage solution and polarographic electrolyte are not universal care products for an optical oxygen sensor.
Record salinity settings, pressure handling, temperature and the measurement units with the result. The BOD and uptake-rate workflows need their own sample preparation and timing; an instrument calculation does not remove those method requirements.
The instrument can retain and export dated records through its supported network and USB connections. Keep the method and sample identity with the exported values so repeated tests remain comparable.
Optical, polarographic or field equipment?
Compare the HI6421/P if a polarographic probe and its membrane/electrolyte maintenance routine suit the laboratory. For field aquaculture work, HI9147-10 is a different portable galvanic system. HI97732 measures a prepared sample with reagents.
These are alternative complete instruments. Confirm probe and method suitability for the sample before choosing a system.
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