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Free SpaceAbsorption Tubes
General Info Sheet
Our free space absorption tubes come in a wide variety of configurations to suit our customers’ needs across several industries including gas sensing, calibration and research. Due to the large number of configurations this info sheet was created to help our customers determine what absorption tube best fits their needs. | |||
Tube Parameters | |||
| Description | Abbr. | Standard Specs |
Path Length (does not include windows) |
L | 2.5cm, 5.0cm, 10cm (other lengths available) | |
Length Tolerance |
| +/- 0.1cm | |
Outer Diameter | OD | 12mm, 25mm | |
Clear Aperture | CA | 9mm, 21mm | |
Stem Tube | T | < 8mm | |
Wedge |
| 0.3 degrees nominal | |
Tilt |
| 3 degrees nominal | |
Window Thickness |
| 1.5mm nominal | |
Window Material |
| B270 glass, MgF2 (see below) | |
Tube Material |
| Soda lime glass | |
Lifetime |
| >10 years | |
The application wavelength range determines the window material:
| < 2.6 microns: AR-coated glass | } | Windows are fritted creating a true hermetic seal |
| < 8 microns: Magnesium Fluoride |
Contact us or visit our website for transmission spectra and more details.
NOTE: Glass windows are left square but can be rounded upon request. MgF2 windows are round.
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