Gas |
Hazard Summary |
OSHA PEL (ppm) |
OSHA STEL
(ppm) |
NIOSH IDLH (ppm) |
Sensor Range (ppm) |
LED
Resolution (ppm) |
Notes |
Ethylene Oxide |
Primary irritant, affecting the skin, respiratory system and eyes.
Known human carcinogen, increased risk of breast cancer, adverse reproductive issues, in extreme cases, respiratory distress and coma may result fro long term exposure
Skin sensitization, respiratory irritation and nervous system effects |
1.0 ppm |
5.0 ppm |
800 ppm |
0 – 50 ppm |
0.1 ppm |
Intrinsic safe model available |
Hydrogen Peroxide |
Extremely irritating to the eyes, skin and respiratory system and contact with the liquid can cause serious burns.
Known animal carcinogen, repeated exposure can cause chronic respiratory irritation or lung collapse. Inhaling high concentrations may result in seizures, cerebral infarction or cerebral embolism.
|
1.0 ppm |
n/a |
75 ppm |
0 – 10 ppm |
0.1 ppm |
|
Ozone |
Ozone is a primary irritant to the eyes, and respiratory system. Even very low concentrations of ozone can be harmful to the upper respiratory tract and the lungs.
Long-term exposures may result in impaired lung function |
0.1 ppm |
n/a |
5 ppm |
0 – 1 ppm |
0.02 ppm |
|
Gas |
Hazard Summary |
OSHA PEL (ppm) |
OSHA STEL
(ppm) |
NIOSH IDLH (ppm) |
Range (ppm) |
Resolution (ppm) |
Notes |
Ammonia |
Causes irritation to eyes, skin, mucous membranes and damage to therespiratory system. Liquid anhydrous ammonia causes severe burns on contact.
|
50 |
|
300 |
0 – 100 |
1 |
|
Arsine |
Damage red blood cells, arsenic poisoning, |
0.05 |
|
3 |
0 – 1 |
0.02 |
|
Carbon Dioxide |
High concentrations of carbon dioxide can lead to can affect respiratory function and cause excitation followed by depression of the central nervous system and concentrations > 10% result in difficulty breathing, impaired hearing, nausea, vomiting, a strangling sensation, sweating, stupor within several minutes and loss of consciousness.
|
5000 |
|
40,000 |
0 – 50,000 |
100 |
IR sensor |
Carbon Monoxide |
Carbon monoxide binds the hemoglobing of the blood, resulting in flu like symptoms, including headache, nausea and vomiting, dizziness, lethargy and a feeling of weakness. Higher concentrations result in neurological signs include confusion, disorientation, visual disturbance, syncope and seizures and death.
|
50 |
|
1200 |
0 – 1000 |
1 |
|
Chlorine |
Chlorine is a severe eye, nose, throat and upper respiratory tract irritant and severe respiratory tract damage including bronchitis and pulmonary edema can occur after even relatively low, brief exposures (15 to 60 ppm).
|
C11 |
|
10 |
0 - 10 |
0.1 |
|
Chlorine Dioxide |
Chlorine dioxide exposure can irritate the nose and throat, causing coughing and chest pain; eye irritation, irritate the lungs causing coughing and/or shortness of breath. Higher exposures can cause a build-up of fluid in the lungs (pulmonary oedema), with severe shortness of breath and possibly death.
|
0.1 |
|
5 |
1 |
0.01 |
|
Combustible |
Combustion/explosion |
|
|
|
0 – 100 % LEL |
1% LEL |
Pellistor, avoid exposure to sulfides and silicon compounds. See also hydrocarbons sensor |
Ethylene |
Exposure to high concentrations can cause neurological effects including anesthesia and eventually symptoms resulting form oxygen deficiency. |
None |
|
None |
0 – 100 |
1 |
For higher concentrations see hydrocarbon or combustibles sensors |
Formaldehyde |
Formaldehyde is an irritant to the eyes, mucous membranes and respiratory system, and it is also a sensitizer causing an allergic response.
IARC/NTC Known human carcinogen |
0.75 |
2 ppm |
20 |
0 – 50 |
0.1 |
|
Hydrocarbons |
Combustion/explosion |
|
|
|
0 – 100 % LEL |
1% LEL |
Responds to hydrocarbons and other C-H containing compounds only. See also combustible gas sensor. |
Hydrogen |
Hydrogen is non-toxic but can cause asphyxiation by displacing air in a closed space. Flammability. |
None |
|
None |
0 - 1000 |
2 |
For higher concentrations see combustible sensor |
Hydrogen Chloride |
Hydrogen chloride is an eye, skin and respiratory irritant. Inhalation of ~1500 ppm in air are fatal
|
5 |
|
50 |
0 – 50 |
1 |
|
Hydrogen Cyanide |
Hydrogen cyanide is very toxic, a few breaths may cause unconsciousness and death; at concentrations above 100 ppm toxic amounts can be absorbed through the skin. |
10 |
|
50 |
0 – 30 |
0.2 |
|
Hydrogen sulfide |
Irritating to eyes and respiratory tract. Highly toxic, broad spectrum, affecting the nervous system in particular, high concentrations cause almost immediate death, but very low concentrations can be tolerated indefinitely.
|
C20, 50 ppm peak once every 8 hrs |
|
100 |
0 – 30 |
0.2 |
|
Nitric oxide |
Nitric oxide has only modest toxicity, but it forms the much more toxic nitrogen dioxide (OSHA PEL Ceiling 5 ppm) on contact with atmospheric oxygen
|
25 |
|
100 |
0 – 100 |
1 |
|
Nitrogen dioxide |
Nitrogen dioxide is an irritant, especially to the respiratory system. Exposure can result in delayed formation of lung edema even at low concentrations. Concentrations >4 ppm will anesthetize the nose, thus creating a potential for overexposure.
|
C5 |
|
20 |
0 – 20 |
0.1 |
|
Nitrous oxide |
Nitrous oxide is an asphyxiant at high concentrations; lower concentrations affect the central nervous system, cardiovascular, hepatic, hematopoietic systems, reproduction.
|
none |
|
none |
0 - 1000 |
10 |
|
Oxygen |
Oxygen is essential for breathing and oxygen deficiency can result in accelerated breathing and heart rate, Nausea, vomiting, inability to perform, and unconsciousness and death. Exposure to too high concentrations of oxygen can result in oxygen toxicity. |
|
|
|
0 – 25 % |
0.1 % |
Steri-Trac alarms if oxygen concentration too high or too low. |
Silane |
Silane toxic and also irritating to the eyes and respiratory system in part because of the formation of silicic acid on reaction with water.
|
None |
|
|
0 – 50 |
0.1 |
|
Sulfur dioxide |
Sulfur dioxide is extremely irritating to the eyes and respiratory tract.
|
5 |
|
100 |
0 – 20 |
0.1 |
|
VOCs |
Various depending on compounds present |
|
|
|
0 – 10, 50 |
0.05/0.1 |
PID (10.6 eV) or electrochemical sensor |
