Ion Science Tiger Select - Manual (Page 6)

TIGER MANUAL Ion Science Ltd
Page 6 of 20
Unrivalled Detection. www.ionscience.com
Introduction
Benzene gas is a carcinogen often associated with petrochemical processing but it is also used as a solvent
in the production of drugs, plastics, synthetic rubbers and dyes. Photo ionization detectors (PID) readily
detect a wide range of VOC gases of which includes Benzene.
Gases that are cross sensitive to Benzene will result in significant errors in reading which are unacceptable
when occupational exposure levels are set around 1ppm.
The Tiger Select has been developed to give an accurate and repeatable measurement of Benzene gas
specifically to sub ppm levels.
The Tiger Select has two modes of operation; TAC mode which identifies the presence of Total Aromatic
Compounds (which include Benzene), and Select mode which then identifies the specific Benzene content.
This two stage approach avoids using filter tube unnecessarily; if there are no TAC gases present there is
also no Benzene.
[JB1]
The Tiger Select uses a 10.0 eV light source so many
of the gases associated with Benzene are ignored.
The remaining gases associated with Benzene are
filtered using a Benzene pre-filter tube.
Note: n-Butane, n-Pentane, Ethylene, Propylene,
Alcohol and Acetate are not shown on this illustration,
however they are also beyond the detection range of
the 10.0 eV lamp so are not detected.