Fluorometer cells with stopper (Types 23, 29F, 28F)

Product / Spectroscopy

Type 23 cells are identical to the standard rectangular fluorometer cells (Type 3) except that a PTFE stopper is supplied. The smaller volume Types 29F and 28F are semi-micro and micro fluorometer cells with a stopper. Unless specifically designed otherwise, all cells are assembled by fully fused construction without intermediate adhesives and can generally be used with pressure differentials of up to three atmospheres. Standard window thickness is 1.25 mm and the standard path length tolerance is ±0.01 mm (catalog general specifications).

Product group: UV/VIS and fluorometer cells
Brand: Starna Scientific

Manufacturer website

Source: manufacturer website (opens in a new tab) · Image: manufacturer website

Order codes and options

16 codes

Fluorometer cells with stopper (Types 23, 29F, 28F) order codes and properties
Code	Window material	Path length	Nominal volume
23-G-5	Optical glass (334-2500 nm)	5 mm	1.7 mL
23-G-10	Optical glass (334-2500 nm)	10 mm	3.5 mL
23-G-20	Optical glass (334-2500 nm)	20 mm	7 mL
23-G-40	Optical glass (334-2500 nm)	40 mm	14 mL
23-SOG-10	Special optical glass (320-2500 nm)	10 mm	3.5 mL
23-Q-5	Spectrosil quartz (far UV) (170-2700 nm)	5 mm	1.7 mL
23-Q-10	Spectrosil quartz (far UV) (170-2700 nm)	10 mm	3.5 mL
23-Q-20	Spectrosil quartz (far UV) (170-2700 nm)	20 mm	7 mL
23-Q-40	Spectrosil quartz (far UV) (170-2700 nm)	40 mm	14 mL
23-I-5	Infrasil quartz (near IR) (220-3800 nm)	5 mm	1.7 mL
23-I-10	Infrasil quartz (near IR) (220-3800 nm)	10 mm	3.5 mL
23-I-20	Infrasil quartz (near IR) (220-3800 nm)	20 mm	7 mL
23-I-40	Infrasil quartz (near IR) (220-3800 nm)	40 mm	14 mL
29F-Q-10	Spectrosil quartz (far UV) (170-2700 nm)	10 mm	1.4 mL
29/9F-Q-10	Spectrosil quartz (far UV) (170-2700 nm)	10 mm	1.16 mL
28F-Q-10	Spectrosil quartz (far UV) (170-2700 nm)	10 mm	0.7 mL

Technical specifications

Fluorometer cells with stopper (Types 23, 29F, 28F) technical specifications
Window materials	Optical glass, Special optical glass, Spectrosil quartz, Infrasil quartz
Path length range (mm)	5 - 40 mm
Nominal volume range (mL)	0.7 - 14
Number of variants	16

Source: starnacells.com (opens in a new tab) · Starna Cells 2026 Catalog, p. 27 (dimension table) · starnacells.com (opens in a new tab) · starnacells.com product type page. Values come from the manufacturer and are confirmed at the quotation stage.