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Hanna HI731331 Glass Cuvettes, 4 Pack — No Caps Default Title Cuvettes & Cuvette Accessories Hanna Instruments
Hanna HI731331 Glass Cuvettes, 4 Pack — No Caps Default Title Cuvettes & Cuvette Accessories Hanna Instruments

Hanna HI731331 Glass Cuvettes, 4 Pack — No Caps

$38.49

    Fresh glass. Keep the matched cap. Restore your cuvette supply without replacing caps you already have. Hanna HI731331 is a four-pack of optically clear glass sample cuvettes for compatible portable photometers and turbidity meters. Every cuvette has a 10 mL level mark and an index mark for alignment; caps are not included.

    • 4 optically clear glass cuvettes; no caps
    • 10 mL level mark and alignment index mark
    • Match the HI731331 accessory code and meter-specific cap

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HANNA REPLACEMENT GLASSWARE · HI731331

Fresh glass. Keep the matched cap.

Restore your cuvette supply without replacing caps you already have. Hanna HI731331 is a four-pack of optically clear glass sample cuvettes for compatible portable photometers and turbidity meters. Every cuvette has a 10 mL level mark and an index mark for alignment; caps are not included.

Hanna HI731331 official manufacturer photograph
HI731331: four glass cuvettes. Caps are ordered separately.

For an existing HI731331 setup

Hanna identifies this glass cuvette family for HI96 portable photometers and portable/benchtop turbidity instruments. Exact-model manuals also list HI731331 for instruments including HI97705, HI97104 and HI83399. Match the accessory code in your instrument documentation and retain the cap design specified for that meter.

What is—and is not—in the pack

This is glass only—not a Checker HC cuvette-and-cap set, a reagent kit or a CAL Check standard. HI97705 and HI97104 use the HI731336N cap; HI83399 uses the HI731335N cap. The same glass accessory does not make the cap assemblies interchangeable.

When a refill makes sense

A four-pack makes sense when the existing cap assemblies remain serviceable but glass is scratched, discolored or missing, or when you want clean spare cuvettes ready for the next sample. A sound optical surface matters: scratches and discoloration can interfere with an optical measurement.

A clean-cuvette workflow

Inspect the glass before use and replace scratched or discolored cuvettes. Follow your meter method for sample preparation and filling; the 10 mL mark is a level reference, not a universal sample-volume instruction. Use the index mark as directed, fit the meter-specific cap and keep the exterior clean and dry before inserting the cuvette. Follow the instrument cleaning procedure after use.

Order the exact pack

Select quantity 1 for one four-cuvette pack, without caps. Manufacturer part number: HI731331. There are no alternate configurations on this page.

Frequently Asked Questions

What is included in one HI731331 pack?

Four glass sample cuvettes. Caps, stoppers, reagents, cleaning supplies, standards and an instrument are not included. Order quantity 1 for one four-pack.

Which instruments use HI731331?

Hanna describes this cuvette family for HI96 series portable photometers and portable/benchtop turbidity meters. Specific manuals also list HI731331 for HI97705, HI97104 and HI83399. Check the exact accessory code for your model rather than selecting by appearance or diameter alone.

Which cap should I use?

Use the cap listed for your exact meter. For example, HI97705 and HI97104 list HI731336N, while HI83399 lists HI731335N. This pack contains no caps; those cap designs are not offered here as interchangeable options.

Does 22 mm mean it fits every 25 mm cuvette holder?

No. The current product is marketed as 22 mm glass cuvettes. The HI97705 and HI97104 manuals specify round 24.6 mm outside diameter and 22 mm inside diameter cuvettes. Those instrument-specific dimensions are not a universal holder, thread or optical-fit guarantee.

Is this the same set used for Checker HC colorimeters?

No. HI731331 is four bare glass cuvettes. HI731315 is a different two-cuvette/two-cap set for the Checker HC family. Choose the accessory code specified for your existing instrument setup.

When is a glass-only refill the right choice?

Choose a glass-only refill when your instrument uses HI731331 and the matching caps are still suitable, or to keep spare clean cuvettes available. Replace scratched or discolored glass because surface defects can interfere with optical measurements.

How do I use the level and index marks?

The cuvette has a 10 mL level mark and an alignment index mark. Follow your instrument method for its actual sample volume, orientation and measurement sequence; do not assume that every method uses the full marked volume.

Can I order HI731331 for an HI731331N listing?

Order the exact accessory code confirmed for your meter. A formal HI731331N-to-HI731331 replacement equivalence is not established here. If your documentation specifies the N-suffix code, confirm the correct current accessory before substituting.

    Product Specifications

    SpecificationDetail
    BrandHanna Instruments
    Manufacturer part numberHI731331
    Product typeReplacement glass sample cuvettes
    Pack contents4 glass cuvettes
    Caps includedNo — retain or order the cap specified for the exact meter
    MaterialOptically clear glass
    Level mark10 mL
    AlignmentIndex mark for photometer alignment
    Family applicationCompatible portable photometers and turbidity meters; verify the exact instrument accessory list
    Manual-confirmed examplesHI97705; HI97104; HI83399
    Diameter contextHI97705 and HI97104 manuals specify round 24.6 mm outside / 22 mm inside cuvettes; not a universal 25 mm fit claim

    Ordering Information

    SpecificationDetail
    Catalog numberHI731331
    Store SKUBTS-HI731331
    One order unit4 glass cuvettes — caps not included

    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.

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