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7 GAS DETECTION - PRINCIPLE
7.1 Generalities
The explosive power of a gas-air mixture depends on the gas concentration in the air. If this
concentration is too low, it is said that the mixture is too weak to explode. If, by increasing the
gas concentration, the mixture becomes rich enough to explode, we have reached the Lower
Explosive Level – L.E.L.
At the Upper Explosive Level - U.E.L., the mixture becomes too rich and cannot explode due
to a lack of oxygen and simply burns.
A DALEMANS sa/nv gas detection control unit helps you to prevent any risk of explosion in
an atmosphere where the risk of a gas leak exists.
7.2 Target gases
The U•H1 control unit has been specially designed to be placed in a heater room environment
where there is a risk of leakage of the following gases:
Gaz *
Formula
Cracked gas
Natural gas
Hydrogen
H
Methane
CH
Butane
C4H10
Propane
C3H8
* List not exhaustive
DALEMANS sa/nv
Rue Jules Mélotte 27A
B-4350 Remicourt
+32 19 33 99 43
Density (air = 1)
-
0,47
-
0,68
0,069
2
0,55
4
2,05
1,56
U•H1 Instruction Manual
COMBUSTION
CAS N°
-
-
1333-74-0
74-82-8
74-98-6
106-97-8
37
|
50
Position
High
Low
Certified
ISO9001 • VCA
www.dalemans.com
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