Rubidium-85 Isotope Rubidium-85 Reference Cells

The Photonics Technologies Rubidium-85 Reference Spectroscopic Cells are available in Pyrex and Quartz with high-purity Rubidium-85 filling.

The Rubidium-85 vapour cells come in a range of sizes, styles, and window materials.

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

Double-side anti-reflective (AR) coated windows are only available on spectroscopic cells made from quartz, with quartz or fused silica windows. The windows are wedged and angled to avoid back reflections along the beam path and undesirable etalon effects. The AR coating centred at 780nm has a wavelength range from 730 to 830nm with a reflectance of less than 0.5%.

Pyrex vapour reference cells are not available with wedged windows, but Pyrex windows can be attached at an angle.

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


Description / Part NumberSC-RB85-(25x75-Q)-ARSC-RB85-(19x75-Q)SC-RB85-(25x75)-P
Cell TypeAR-coatedQuartzPyrex
Optical Path Length:75mm75mm75mm
Stem Height:<10mm<10mm<10mm
Window Aperture:20mm
Window Material:UV Fused SilicaUV Fused SilicaBorosilicate (Pyrex)
Window Thickness:3mm3mm1.6mm
Window Angle:11°
Window Type:AR-Coated 730nm to 830nmWedged 2°Flat, fused to body
Window Flatness:λ/10
Window Quality:40-20 Scratch & Dig60-40 Scratch & Dig60-40 Scratch & Dig


4 Weeks

In stock for immediate delivery:


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