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