Triangular Quartz Cuvette: Choosing a Different Viewing Geometry

CUSTOM DESIGN GUIDES · C033SS

A cuvette’s shape affects more than the holder fit. The face orientations also influence how illumination and observation are arranged. C033SS has a triangular section, three transmitting faces, JGS1 quartz construction, a nominal 1.75 mL capacity and a supplied PTFE stopper. Start with the illumination and collection directions when considering this geometry.

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What changes when the section becomes triangular? · Where do 11.5, 11.5, 15 and 45 mm belong? · Once the view is chosen, make cell location repeatable · Leave access for the stopper and sample loading · Project checks · Order or enquire

What changes when the section becomes triangular?

Opposing faces of a conventional square cell give a straightforward starting point for transmission. A triangular section offers a different relationship between the faces. Starna’s triangular fluorometer-cell catalogue describes this geometry as one option for front-surface measurement, giving context for considering another section.

That context does not specify C033SS angles, optical paths or fluorescence performance. Three transmitting faces do not automatically establish a 90-degree fluorescence arrangement. Draw the experiment’s actual illumination and collection directions before selecting it.

Where do 11.5, 11.5, 15 and 45 mm belong?

The 11.5, 11.5 and 15 mm values are the three outside edges of the triangular section. The 45 mm value is body height. These are not a rectangular length–width–height set or optical paths. Nor does 45 mm establish the overall height with the stopper fitted.

The holder must accommodate the section while leaving access for illumination, collection and stopper removal. The engineering reference separates supported dimensions from unresolved details and can be reviewed alongside the apparatus sketch.

C033SS · Current product specifications

Open engineering reference R01 and PDF

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Once the view is chosen, make cell location repeatable

Suppose illumination and collection directions are already chosen, but the cell must be removed for cleaning and replaced. The triangular section is a starting point; the holder must also locate the intended orientation. Number the three faces on the apparatus sketch and mark illumination, collection and support so the discussion has a common reference.

The triangular section changes the face relationships and calls for location suited to the apparatus. Support needs to establish the intended position while leaving illumination, collection and stopper access clear. Section shape and the 45 mm body height alone do not describe those handling requirements.

If the existing three outside edges and optical faces are suitable, retain them and specify the locating datum, permissible support edges and stopper access. If the section must change, dimension its three edges separately and review viewing geometry and capacity again. Establish optical angles and effective paths for the project rather than infer them from a photograph.

Leave access for the stopper and sample loading

A PTFE stopper is supplied. Loading, closure and cleaning all need access above the cell. The installation should allow for overall height with the stopper fitted and for removing it by hand or with the intended tool. If evaporation control or closed operation matters, specify the medium, temperature and sealing conditions for a separate closure review.

If weak fluorescence makes the empty-cell background important, request the relevant test information. Such performance has not been established for this product and cannot be inferred from the quartz material or number of transmitting faces.

Put the viewing geometry into the drawing and fit check

For an apparatus that depends on viewing direction, discuss the following before ordering. Treat geometric fit, optical testing and closure requirements separately from the material and supplied stopper configuration.

• Section: Review the 11.5, 11.5 and 15 mm outside edges and 45 mm body height separately; agree required tolerances and overall height with the stopper.
• Datum: Relate the nominated face or edge to the holder datum and review orientation after replacement and clearance for illumination and collection.
• Optical data: If needed, specify wavelength, measurement geometry, specimen or empty-cell condition and required records, then establish availability.
• Stopper: Review loading and stopper removal in the intended apparatus. For sealing performance, separately agree medium, temperature, target and check method.