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Hanna Instruments HI6421/HI6421P Advanced Benchtop Dissolved Oxygen Meter (Optical/Polarographic)
Hanna Instruments HI6421/HI6421P Advanced Benchtop Dissolved Oxygen Meter (Optical/Polarographic)
Hanna Instruments HI6421/HI6421P Advanced Benchtop Dissolved Oxygen Meter (Optical/Polarographic)
Hanna Instruments HI6421/HI6421P Advanced Benchtop Dissolved Oxygen Meter (Optical/Polarographic)
Hanna Instruments HI6421/HI6421P Advanced Benchtop Dissolved Oxygen Meter (Optical/Polarographic)
Hanna Instruments HI6421/HI6421P Advanced Benchtop Dissolved Oxygen Meter (Optical/Polarographic)

Hanna Instruments HI6421/HI6421P Advanced Benchtop Dissolved Oxygen Meter (Optical/Polarographic)

$1,654.99

    Achieve highly accurate dissolved oxygen measurements in diverse aquatic samples with the HI6421 (optical opdo®) and HI6421P (polarographic) advanced benchtop meters. Featuring a modern, large touchscreen interface, these instruments deliver reliable performance for fresh and saltwater analysis.  

See All Specs

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Fast Delivery

Most items ship same day

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Manufacturer Warranty

All products are covered by manufacturer warranty

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After-Sale Support

24/7 support

What's Included

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VR Headset

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2 Touch Controllers

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Charging Cable

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Power Adapter

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Glasses Spacer

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Advanced Dissolved Oxygen Meter with Optical DO Probe

Advanced Dissolved Oxygen Meter with Optical DO Probe (opdo®)

Unlock precise dissolved oxygen measurements with the HI6421, featuring Hanna's innovative HI7641133 optical DO probe (opdo®). This advanced technology relies on the principle of fluorescence quenching to deliver accurate and stable readings.

Smart Cap Advantage

Experience effortless probe management with our user-friendly Smart Caps (HI764113-1). These intelligent caps securely lock onto the probe and automatically transmit pre-loaded calibration coefficients, streamlining your setup process. The robust, insoluble black oxygen permeable protective layer safeguards the immobilized oxygen-sensitive luminophore.

Consistent Accuracy Over Time

The probe's ingenious design compensates for the natural aging of optical components by utilizing a reference signal. This ensures reliable dissolved oxygen measurements over extended periods, minimizing the need for frequent calibrations and maximizing your efficiency.

Advanced Dissolved Oxygen Meter with Polarographic DO Probe

The HI6421P model is equipped with the HI764833 polarographic probe, a slim and versatile solution for a wide spectrum of dissolved oxygen measurements. Its integrated thermistor diligently compensates for temperature fluctuations, ensuring data integrity.

Designed for Diverse Applications

The probe's slender profile allows for convenient measurements in various containers, including test tubes and Biological Oxygen Demand (BOD) bottles. Its robust construction features a dependable platinum cathode and Ag/AgCl anode assembly, delivering rapid and accurate readings that are independent of flow.

Intelligent Environmental Compensation

Achieve unparalleled accuracy with automatic compensation for barometric pressure and temperature. Salinity adjustments are easily made by manually inputting the concentration of the water sample. The built-in barometer handles pressure compensation automatically, or you can enter values manually in your preferred units: mmHg, mbar, kPa, inHg, psi, atm.

Advanced Dissolved Oxygen Meter with Polarographic DO Probe
HI6421 Advanced Dissolved Oxygen Meter User Interface

Intuitive User Experience

Effortless Interaction

  • Navigate with ease using the vibrant 7-inch capacitive touch screen, featuring multi-touch support.
  • Quick access to essential functions with capacitive touch back, home, and system menu keys.
  • User-friendly icons and symbols make instrument functions simple to understand and operate.

Five Dynamic Views

  • Configure basic measurement settings quickly and efficiently.
  • Access Simple GLP information, including calibration details, at a glance.
  • Explore Full GLP, complete with electrode status and detailed calibration point information.
  • Visualize your data with a live, interactive graph that updates in real-time.
  • Review tabulated data, including date, time, and any added notes for comprehensive record-keeping.

Advanced Measurement & Calibration

Streamlined Measurement

  • Application-specific profiles enable immediate, direct measurement without needing to adjust sensor and system settings.
  • Monitor your data in real-time with the active log during measurement.
  • Ensure reliable readings with the measurement stability indicator, customizable via Stability Criteria settings.
  • Choose between direct reading modes and direct/autohold functions for flexible data capture.
  • Benefit from automatic or manual temperature compensation for accurate results in varying conditions.
  • Receive audible and/or visual alarm messages when measurements fall outside predefined limits.
  • Enjoy enhanced data integrity with galvanic isolation for measurement.

Simplified Calibration

  • Perform one or two-point calibration at 0% and/or 100% saturation for optimal accuracy.
  • Utilize single-point manual calibration in mg/L or % saturation using a reference method.
  • Rest assured that non-volatile memory securely saves your data and settings.

Included Zero Oxygen Solution

For precise DO calibration, the HI7040L bi-component zero oxygen solution is included, allowing you to quickly and accurately calibrate to 0% oxygen concentration right from the start.

HI6421 Advanced Dissolved Oxygen Meter Measurement and Calibration Screens
HI6421 Advanced Dissolved Oxygen Meter Connectivity and Help Screens

Data Logging & Connectivity

Extensive Data Management

  • Collect and store up to 1,000,000 data points, complete with precise time and date stamps.
  • Choose from manual, automatic, and autohold logging types to suit your specific needs.
  • Add Sample IDs for manual and autohold data for enhanced traceability.

Versatile Connectivity

  • Easily transfer logged data to a USB thumb drive for convenient access.
  • Export comprehensive log files, including measurements and calibration data, in a universally compatible .csv format.
  • Utilize FTP and email for seamless log export via Ethernet and Wi-Fi connections.
  • Connect various peripherals with USB type A ports for USB sticks, keyboards, and printers.
  • Enjoy flexible PC connectivity with the USB type C port for data transfer and more.

Integrated Help Resources

  • Access helpful video presentations directly on the meter to guide you through main functionalities.

Innovative Smart Cap Technology

Automatic Cap Recognition

Hanna's Smart Caps are equipped with a built-in RFID reader, enabling the storage of critical data such as the manufacture date and first-use date, enhancing traceability and ensuring data integrity.

Extended Operational Life

Each Smart Cap offers a one-year lifespan from the initial date of use. The meter automatically tracks this countdown and provides timely on-screen reminders as the expiration approaches, ensuring you always have a reliable sensor.

Guaranteed Correct Alignment

An integrated alignment key ensures that your Smart Cap is fitted correctly every single time, eliminating guesswork and ensuring optimal performance with every measurement.

HI6421 Smart Cap Technology

    Shipping, Return, and Warranty Policy

    At Blue Tiger Scientific, we are proud to distribute authentic Hanna Instruments products. The following policies apply to all purchases made through our store.

    Shipping Policy

    • All orders are shipped via FedEx from Hanna Instruments' fulfillment center in Smithfield, Rhode Island.
    • FedEx Ground is the standard method; expedited options (2-Day, Overnight) are available for an additional cost.
    • Hanna Instruments only ships to residential or business addresses within the United States (no PO Boxes).
    • Orders placed after business hours, weekends, or holidays will ship the next business day, pending product and carrier availability.
    • Shipping timelines may vary depending on product availability, order size, and carrier logistics.
    • Blue Tiger Scientific and Hanna Instruments are not responsible for carrier delays, weather-related disruptions, or other unforeseen delivery issues once the order has shipped.

    Return Policy

    • All return requests must be coordinated directly with Blue Tiger Scientific before a product is sent back.
    • Products must have a Return Merchandise Authorization (RMA) number issued by Blue Tiger Scientific before being returned.
    • Products must be returned in new or like-new condition, with the original packaging and proof of purchase (such as an invoice or packing slip).
      Customers are responsible for return shipping costs unless otherwise stated.
    • Unauthorized returns (without an RMA) will be refused and returned at the customer's expense.
      Returns are subject to inspection and approval. Products not in acceptable condition may be denied credit.
    • Some products, such as custom-built, special order, and hazardous materials, may not be eligible for return.

    Warranty Policy

    • Hanna Instruments' products are covered by their Limited Warranty against defects in materials and workmanship under normal use.
    • All warranty claims and services are handled directly by Hanna Instruments.
    • Warranty periods vary by product. If unspecified, the standard warranty term is 18 months from the Hanna Instruments factory ship date.
    • If you experience an issue believed to be covered under warranty, please contact Hanna Instruments for guidance on how to submit your warranty request to Hanna Instruments.
    • Customers must follow Hanna Instruments' warranty submission process, including providing a claim number, product model and serial number, and a detailed description of the issue.
    • Hanna Instruments will determine whether products are repaired, replaced, or otherwise serviced under warranty.
    • Note: Warranty coverage does not apply to damage caused by misuse, accidents, unauthorized repairs, or improper storage and handling.

    Important Notes

    • Some Hanna Instruments products are custom-made or built to order. Shipping will occur once the product is ready.
    • In the event of backorders, you may request partial shipments.
    • Delays beyond our control (e.g., material shortages, import delays, or carrier issues) may occasionally occur.
    Advanced Dissolved Oxygen Benchtop Meter Instruction Manual
    Download
    Manual

Product Resources:

Copy of Technical Specifications

FeatureDetails
Viewing Head Siedentopf type trinocular head, inclined at 30°, Interpupillary adjustment 53mm to 75mm, graduated diopter on left eyetube (30mm I.D. eyetubes)
Eyepieces SWH10X Widefield high eyepoint eyepiece, Field No. 22, tube O.D. 30.0 mm
Nosepiece Quintuple
Quintuple LWD Planachromat Phase 10x, 20x
Condenser TC Condenser N.A. 0.30, W.D. 73.0mm
Stage180mm(X) x 245mm(Y) plain stage with replaceable glass insert with 45mm opening, Glass Stage plate insert
IlluminationKoehler without iris, with phase slider, 3W LED
WarrantyLIMITED LIFETIME WARRANTY
Expanded View

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