Micro cells with stopper (Type 28 and 28B)

Product / Spectroscopy

Type 28 cells are identical to Type 18 micro cells except that they are supplied with a PTFE stopper to reduce evaporation of volatile samples. The external height is 48 mm plus the stopper. Alignment of micro cells in instrument cell holders is critical. 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

12 codes

Micro cells with stopper (Type 28 and 28B) order codes and properties
Code	Window material	Path length	Nominal volume
28-Q-5	Spectrosil quartz (far UV) (170-2700 nm)	5 mm	0.35 mL
28-Q-10	Spectrosil quartz (far UV) (170-2700 nm)	10 mm	0.7 mL
28/9-Q-10	Spectrosil quartz (far UV) (170-2700 nm)	10 mm	0.58 mL
28-Q-20	Spectrosil quartz (far UV) (170-2700 nm)	20 mm	1.4 mL
28-Q-40	Spectrosil quartz (far UV) (170-2700 nm)	40 mm	2.8 mL
28-Q-50	Spectrosil quartz (far UV) (170-2700 nm)	50 mm	3.5 mL
28B-Q-5	Spectrosil quartz (far UV) (170-2700 nm)	5 mm	0.35 mL
28B-Q-10	Spectrosil quartz (far UV) (170-2700 nm)	10 mm	0.7 mL
28B9-Q-10	Spectrosil quartz (far UV) (170-2700 nm)	10 mm	0.58 mL
28B-Q-20	Spectrosil quartz (far UV) (170-2700 nm)	20 mm	1.4 mL
28B-Q-40	Spectrosil quartz (far UV) (170-2700 nm)	40 mm	2.8 mL
28B-Q-50	Spectrosil quartz (far UV) (170-2700 nm)	50 mm	3.5 mL

Technical specifications

Micro cells with stopper (Type 28 and 28B) technical specifications
Window materials	Spectrosil quartz
Path length range (mm)	5 - 50 mm
Nominal volume range (mL)	0.35 - 3.5
Number of variants	12

Source: starnacells.com (opens in a new tab) · Starna Cells 2026 Catalog, p. 9 (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.