5 mm Screw-Top Quartz Cell: Choosing Path and Capped Height (MQQSC037)
Custom design guide · MQQSC037
A nominal 5 mm path and a screw-top opening offer a different combination from an open 10 mm cell. The narrow body needs support, while the 58 mm capped height needs overhead clearance.
The situations and proposed changes below are planning examples, not completed customer projects.
Selection · Configuration · Structure · Custom version · Fit and use · Drawing · Enquiry
Combine a 5 mm path with a workable screw-top arrangement
MQQSC037 is a configuration to compare when a method calls for a 5 mm sample path and loading through a screw opening. It has a listed 1.75 mL nominal capacity in a 12.5 × 7.5 × 35 mm optical body. The 7.5 mm outside depth is a mechanical dimension, not the optical path.
For absorbance under Beer–Lambert conditions, a change from a 10 mm to a 5 mm path halves calculated absorbance at fixed concentration and wavelength. That is a theoretical selection relationship, not a test result for this cell or a fluorescence prediction. The method must still operate in its useful measurement range.
The listed configuration
View the selection schematic
How the structure differs from a conventional cell
Reducing one chamber direction creates the shorter sample path, while the larger neck supplies a different loading and closure arrangement. This also changes the holder support and upper envelope. The optical body is 35 mm high, but the uncapped and capped heights are 53 mm and 58 mm respectively.
Technical basis: IUPAC Gold Book: Beer–Lambert law. Basis of the theoretical path-length comparison; not a performance measurement of this SKU.
Identify which part of the compartment limits the fit
If the obstruction is the lid, show the complete capped outline and the movement needed to open or remove the cell. Keep the 5 mm path and optical body fixed if those already suit the method. A shorter body alone may not solve a closure-clearance problem.
If the issue is support or beam position, mark the holder datums, useful window and permitted contact faces. For another cap, also state its function and wetted-material needs. The M10 designation does not qualify every cap, liner or seal arrangement.
View a custom-design discussion sketch
Three checks for the proposed setup
- Optical orientation. Mark the 5 mm path separately from the 7.5 mm outside depth.
- Holder support. Locate the narrow body without allowing it to lean or rotate.
- Cap access. Include the 58 mm capped envelope and opening/removal movement.
Check cap access before filling the cell
Walk through loading, cap handling and placement in the intended holder. Then evaluate the optical arrangement with the appropriate blank. Use an agreed residue-specific cleaning method. Closure performance needs its own conditions and acceptance check; it is not established by the screw-top form.
Which dimensions should I send for a compartment-fit review?
Send the support footprint, beam-centre height, useful beam size, available capped height and access for opening or removal. Include a section drawing if the lid is close to the neck. These describe the fit more clearly than body height alone.
Engineering dimension reference
The reference records known external dimensions and configuration notes. Internal geometry, tolerances and operating limits still require a project-specific specification.
Open the engineering reference image
Download MQQSC037 engineering reference R02 (PDF). Illustrative design example; not an actual customer requirement.
Order this configuration or discuss a change
View MQQSC037 specifications and current pricing. Ask about availability and preparation or production time if you have a required delivery date.
For a modified version, attach a dimensioned drawing or labelled sketch. Contact MQ to review feasibility, quantity, inspection scope, price and timing for the proposed design.
Copy a starting brief for your enquiry
Reference SKU: MQQSC037
Required path/beam centre ___; holder contacts ___; capped envelope and access ___; closure function/materials ___; medium and checks ___; quantity ___.
Attach your marked drawing and note any required inspection or documentation. Include the destination and target date so preparation, transport and customs can be discussed separately.
Send your sketch and requirements. Identify fixed interfaces and proposed changes.
Configuration and technical references
Configuration source: MQQSC037 configuration information. Listed parameters reviewed 26 October 2026.
Prepared for MachinedQuartz product selection and custom enquiries. MachinedQuartz is a US-based supplier established in New Mexico, USA, in 2026. Contact MQ. Custom cuvette enquiries · More design guides.
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