HARMFUL/FLAMMABLE GAS :
Three basic kinds of hazards
Three basic kinds of hazards
Oxygen (deficiency and enrichment)
Flammable gases and vapors
Toxic contaminants
OSHA Has Determined Asphyxiation to Be the Leading Cause of Death in Confined Spaces. Air is oxygen deficient whenever concentration is less than 19.5% O2.
Flammable gases and vapors
Toxic contaminants
OSHA Has Determined Asphyxiation to Be the Leading Cause of Death in Confined Spaces. Air is oxygen deficient whenever concentration is less than 19.5% O2.
Poisoning
As an LEL sensor become poisoned the sensors surface and the sensors pores will be coated with oxidized silicone.
A silicone poisoned sensor will first loose its ability to detect methane, while not exhibiting any noticeable inhibition to detect other combustible gases .
As poisoning progresses the the LEL sensor will eventually lose is ability to detect any combustible gases.
A silicone poisoned sensor will first loose its ability to detect methane, while not exhibiting any noticeable inhibition to detect other combustible gases .
As poisoning progresses the the LEL sensor will eventually lose is ability to detect any combustible gases.
Biosystems Toxic Gas Sensors
Carbon monoxide (CO)
Hydrogen sulfide (H2S)
Combination sensors are available
Sulfur dioxide (SO2)
Chlorine (Cl2)/chlorine dioxide (ClO2)
Ammonia (NH3)
Phosphine (PH3)
Nitrogen dioxide (NO2)
Hydrogen cyanide (HCN)
Nitric oxide (NO)