ABB LS4000 Operating Instructions Manual - page 21
LS4000, LS4060 DIODE LASER ANALYZERS | OI/LS4000/O2-EN REV. A
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Laser classification
The laser beam comes into contact with the gas being analyzed.
The gas analyzer may be used for analysis of one of the following media:
Medium Zone
Classification
Explosive gases
Zone 0
IIC T6
Explosive dusts
Zone 21
IIIC T88°C
The laser analyzer is not approved for the analysis of media that
contain a mixture of explosive gases and dusts.
Safely separate the installation location of the gas analyzer from
zone 0.
In case of contact between the laser beam and the explosive gas
or dust mixture: Note the atmospheric conditions (see below).
Temperature
−20 to +60 °C
Pressure (absolute) 80 to 110 kPa (0.8 to 1.1 bar)
Oxidizing agent
Air with normal oxygen content, usually 21 % (V/V)
Laser classification
Atmospheric
conditions for the
explosive gas or dust
mixture