Oldham BM25 Operating Manual

26
Gas Molecular
Formula
LEL
LSE
2
Vapour
density
Coef. / CH
4
Suggested
gas calibr.
Abbreviation
(French)
Ethyl Acetate C
4
H
8
O
2
2.1% 11.5% 3.0 1.35 But/Prop AET
Acetone C
3
H
6
O 2,15 %
13 % 2,1 1,70 But/Prop ACO
Acetylene C
2
H
2
1,5 % 100 % 0,9 1,3 But/Prop ACY
Butadiene C
4
H
6
1.4% 16.3% 1.85 1.25 But/Prop BUD
Butane C
4
H
10
1,5 % 8,5 % 2,0 2,13 But/Prop BUT
Butanone C
4
H
8
O 1.8% 11.5% 2.5 1.75 But/Prop BUN
Diméthyléther C
2
H
6
O 3.0% 27.0 1.6 1.55 But/Prop DIM
Essence SP Mélange 1.1%
∼ 6 %
3 à 4 3 But/Prop ESS
Ethanol C
2
H
6
O 3,3 % 19,0 % 1,6 1,50 But/Prop ETA
Ethylene C
2
H
4
2,7 % 34,0 % 0,98 1,30 But/Prop ETY
G.P.L. Prop+But
1,65
%
∼ 9,0 %
1,85 1,90 But/Prop GPL
Gasoline Mélange 0.6%
∼ 6 %
>4 5 But/Prop GSL
Natural gas CH
4
5,0 % 15,0 % 0,55 1,05 CH
4
GNT
Hexane C
6
H
14
1,2 % 7,4 % 3,0 2,30 But/Prop HEX
Hydrogen H
2
4,0 % 75,6 % 0,069 0,89 But/Prop H
2
Isobutane C
4
H
10
1.5%
∼ 15 %
2.0 1.6 But/Prop ISB
Isopropanol C
3
H
8
O 2,15 %
13,5 % 2,1 1,9 But/Prop ISP
5,0 % 1,00 Methane
3
CH
4
4,4 %
15,0 %
15,0 %
0,55
1,14
CH
4
CH
4
Methanol CH
3
OH 5,5 % 44,0 % 1,1 1,175 But/Prop MTL
Methylamine CH
3
NH
2
4.9% 20.7% 1.1 1.05 CH
4
MAM
Propylene oxide C
3
H
6
O 2.3% ? 2.0 2 But/Prop OPR
Ethylene Oxide C
2
H
4
O 2.6% 100% 1.5 2.1 But/Prop ETO
Pentane C
5
H
12
1,4 % 8,0 % 2,5 2,08 But/Prop PNT
Propane C
3
H
8
2,0 % 9,5 % 1,6 1,77 But/Prop PRO
Propylene C
3
H
6
2,0 % 11,7 % 1,5 1,2 But/Prop PRY
Toluene C
7
H
8
1,2 % 7,0 % 3,1 2,10 But/Prop TOL
WSP
Xylene C
8
H
10
1,0 % 7,6 % 3,7 2,5 But/Prop XYL
1
Lower flammable limit
2
Upper flammable limit
3
The LEL adopted value for methane varies by country, there are two different CH
4
ranges
(LEL = 4.4% and 5.0% = LEL) to consider.
If the explosive gas that you want to detect is not in the list above, you can use the window
"other" by selecting a coefficient given by INDUSTRIAL SCIENTIFIC- (contact us).

Oldham BM25 Specifications

General

Brand	Oldham
Model	BM25
Category	Measuring Instruments
Language	English