
Gas
IDLH (ppm)
PEL (ppm)
STEL (ppm)
LEL (ppm)
Carbon Monoxide
1200
25
N/A
125,000
Carbon Dioxide
40000
Model
27500
30000
N/A
Nitrogen Dioxide
20
N/A
1
N/A
Ammonia (NH3)
300
25
35
150,000
Hydrogen
N/A
N/A
N/A
40,000
Hydrogen Sulfide
100
10
15
40,000
Methane
N/A
N/A
N/A
50,000
Ozone
5
0.1
0.3
N/A
PERC
N/A
N/A
N/A
N/A
Sulphur Dioxide
100
2
5
N/A
Isobutylene
N/A
N/A
N/A
18,000
IDLH
: Immediately Dangerous to Life or Health
PEL
: Permissible exposure limit (usually based upon a time weighted 8 hour average
STEL
: Short - term exposure limit ( 1 hour average)
LEL:
Lower explosion limit
Source: http://www.cdc.gov/niosh/idlh/intridl4.html 21/06/2013 (always check for latest
information)
Page | 26
Kanomax Gasmaster User Guide
MRK-D-0002 V3