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1. General information on O2-detection
NITROGEN GENERATORS
Please note that if a nitrogen generator is being used in the area where the O2 sensor
is installed, the excess oxygen created by the nitrogen generator must be led out of
the area. It is not allowed to use the O2 sensor in the area if the oxygen is not led out.
The LogiCO2´s O2 Safety Systems measures the O2 concentration in a confined space environment
and provides alerts/alarms in the event that O2 levels in that space reaches the pre-set alarm levels.
The O2 sensing devices uses optical analysis for detection of O2.
If a sensor detects a low or high O2 level, the O2 sensor alerts via sound and light-diodes as well as
remotely connected warning lamps, horns or horn/strobes which will be activated. If it is connected to
our Mk9 central unit it will also display which sensor has detected an alarm O2 level.
First after a self-diagnostics program has been done by the system the sensor will begin to detect O2
levels when powered on. The system is delivered pre-connected. With auxiliary kits, functionality can
be substantially extended. There is a set which is comprised of one O2 sensor, one central unit, one
horn/strobe as well as appropriate signs. As well as one with the Stand alone version.
O2 concentration levels (%) and effects
(%) Effect
20.9 Normal.
19.0 Some unnoticeable adverse physiological effects.
16.0 Increased pulse and breathing rate, impaired thinking and
attention, reduced coordination.
14.0 Abnormal fatigue upon exertion, emotional upset, faulty
coordination, poor judgment.
12.5 Very poor judgment and coordination, impaired respiration
that may cause permanent heart damage, nausea and
vomiting.
<10.0 Inability to move, loss of consciousness, convulsions, death.
Source: Compressed Gas Association, 2001.
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