items may be located under cardboard partitions,
so check carefully for contents. If you are missing
any items please contact Crowcon immediately.
Be prepared to quote the instrument’s serial
number which can be found at the bottom of the
label on the rear of the instrument.
Ensure batteries are fresh/charged prior to use.
See ‘Switch on Sequence’ (Section 5.1) for details
of the battery level indicator.
3. Introduction
The Crowcon Gasman II is a personal gas
detector which can continuously monitor the level
of oxygen or the presence of a single toxic or
flammable gas. It is designed to be worn by
individuals working in hazardous environments
such as confined spaces and will give a loud
audible and bright visual alarm warning when pre-
set concentrations of gas are exceeded.
It is a simple instrument to use, designed to
provide reliable service for many years. The
shape of the instrument has been designed to fit
comfortably against the body and pose the least
restriction to movement. It can fit in a pocket or
on a belt.
Datalogging is standard on all models providing
approximately 1 week capacity at a 1 minute
sampling rate. This capacity can be extended by
reducing the sampling rate (see Section 12).
Toxic and oxygen versions are fitted with alkaline
batteries which offer a life of 1 year*. Flammable
versions are fitted with re-chargeable nickel metal
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