Filter tubes – Ion Science Tiger Select User Manual
Page 8
TIGER MANUAL
Ion Science Ltd
Page 8 of 20
Unrivalled Detection. www.ionscience.com
Filter tubes
Benzene Pre filter tubes absorb many VOC gases however the Benzene content passes through. The gas
sample must be drawn through the tube to condition it before the absorption level becomes stable. Please
see the leaflet supplied with the pack of tubes for maximum absorption levels.
Important
During the Benzene measurement, the Yellow/Orange indicating layer turns brown or green in the presence
of other aromatic hydrocarbons and/or benzene hydrocarbons. If this colouring is longer than the ¾ marking,
the filter capacity of the tube is not sufficient anymore and the Benzene display may not be accurate.
Benzene
Various VOC
gases
Direction of gas flow
¾
marking
Tube holder