Caesium Reference Cell Caesium Reference Cells

The Photonics Technologies Caesium Reference Spectroscopic Cells can have AR-coated Quartz windows, Pyrex windows fused to the body or Quartz windows.

The Caesium Reference Cells are available in a range of sizes, styles, and window materials.

Please see the ‘options’ tab in the table below for more details

The cells with anti-reflection (AR) -coated Quartz windows have the AR coating centered at 780nm with a wavelength range from 730 to 830nm with a reflectance of less than 0.5%.

For cells in stock and available for immediate delivery, please click on the ‘delivery’ tab in the table below

Due to the filling material, these cells are classed as Dangerous Goods for carriage by Air. Please contact us for a quote with shipping to your specific location.

If you require a specific cell not listed, please contact us for more information.

Price on Application


Caesium Quartz Spectroscopy Cells
Description / Part NumberSC-CS-(19x75-Q)-W+A
Diameter:19mm (2° wedge)
Optical Path Length:75mm internal length
Windows:Fused Silica (FRIT to body), 3.2mm thickness, 60/40 scratch/dig quality, λ/4 wave flatness
Window Type:Wedged, 11° angle against body
Caesium Pyrex Spectroscopic Cells
Description / Part NumberSC-CS-(25x75-P)SC-CS-(25x25-P)-LQSC-CS-(26x50-P) NE(20T)
Diameter:25 mm26 mm26 mm
Optical Path Length:75mm internal length25mm internal length50mm internal length
Windows:Pyrex, Fused to body,PyrexPyrex,
1.6 mm thickness,λ/4 wave flatness,
60/40 scratch/dig quality60/40 scratch/dig quality
Window Type:FlatFlatFlat
Buffer Gas:Neon (20 Torr)


4 Weeks

In stock for immediate delivery:


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