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The position of the probe is a crucial factor for a gas detection unit correct functioning.
In order to obtain the maximum results from an appliance and minimize the probabilities of false alarms, we recommend
to follow this diagram and to keep in mind the following general rules.
The remote probe must be located at different heights, according to the type of gas.
These heights are:
- 30 cm from the lowest point of the floor in order to detect
Heavy Gases
:
LPG,
Gasoline vapours, Alcohol,
white spirit, Ethanol, Acetone, Chlorine, CO.
- 30 cm from the highest point of the ceiling in order to detect Light gases:
Methane, Hydrogen,
Ammonia, Acetylene.
- The probe should not be placed near the appliances to be controlled (boilers, burners, industrial kitchens, etc.) but
on the opposite wall.
- The probe should not be affected by smoke, vapour, etc. as they could distort their measurement. It must be placed
away from sources of heat, suction fans, ventilation fans.
Positioning of the Sensor
Detection diagrams data
30 cm. Heavy gases
Average height volatile gases
30 cm. Light gases
ppm
0 50 100 150 200 250 300
6,7
Toxic Gas Detection diagram
0
4
5
1
0
1
5
2
0
7,2
20
m A
L in ea r +/ -5 %
Zona A va ri a
9,3
12
14,6
17,3
Explosive Gas Detection diagram
0 4% 8% 12% 16% 20%
0
4
5
1
0
1
5
2
0
7,2
10,4
13,6
16,8
20
m A
L in ea r +/ -5 %
L . I . E .
Zona A va ri a
Curren t-Vo ltage Con vers io n G raph
with 220 Ohm Load Resistance
0
4
5
1
0
1
5
2
0
V.
m A
0,88 1,1 2,2 3,3 4,4
L in ea r +/ -5 %
NO !
NO !
