Z Dimension of Sub-Micro Cuvettes
Choose a cuvette by matching its optical window to your instrument’s actual beam and holder. A brand name or nominal path length alone does not confirm fit.
Before ordering: confirm the exact instrument model, installed holder or accessory, beam height, window aperture and cuvette dimensions. The previous automatic compatibility lookup is unavailable while its model records are being checked. Please do not use an earlier lookup result as a compatibility guarantee.
What does Z dimension mean?
Z dimension, also called center height, describes the height of the optical window center above the cuvette base. Path length describes the distance light travels through the sample. These are separate dimensions.
Manufacturer catalogs list cells with different center heights, including 8.5 mm and 15 mm. These examples are not a rule for every instrument or every cuvette. A full-height window and a small masked window require different checks.
A practical selection checklist
- Identify the instrument and holder. Record the complete model and the part number of any installed holder, changer or adapter. Check the manual for that configuration.
- Confirm the beam position and aperture. Compare the instrument beam height and beam size with the cuvette window drawing. Do not assume all models from the same brand share one height.
- Check physical fit. Compare outer width, depth, height, base shape and any lid or connector clearance with the holder dimensions.
- Check measurement requirements. Confirm path length, minimum working volume, window directions and the material needed for your wavelength and sample.
- Resolve missing information before purchase. Send the relevant manual page or a dimensioned drawing with the proposed MQ SKU. An adapter must be suitable for the specific holder; it is not a universal fix.
Get help checking an MQ product
Use our contact form and include the instrument model, holder details, required path length and volume, and the MQ product link. We can review the supplied information and confirm what evidence is still needed. Custom dimensions, tolerances, minimum quantity and lead time are decided in the project quotation.
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Frequently asked questions
Does a 10 mm path length tell me the Z dimension?
No. Path length and optical window height are independent. Check the product drawing and the instrument holder requirements.
Can a spacer make any cuvette compatible?
No universal adapter recommendation is provided. An adapter must be checked for the holder, beam alignment, physical clearance and measurement setup.
What if my model is not listed?
Use the exact model’s manual or ask the instrument manufacturer for the installed holder specifications. Send that evidence with your MQ product enquiry.
Reference
Hellma Analytics cuvette catalog lists center height, outer dimensions and aperture separately. It is a reference for those products, not proof that an MQ SKU fits a particular instrument. Instrument names are used for identification; no manufacturer affiliation or endorsement is claimed.