Gas detection since 1983, wireless gas detection since 2005

 
 
Sensors
Electro-chemical Sensors Information and how they work

• City Tech
• Nemoto Tech

Oxygen Sensors

• Alphasense Application Note 009

Catalytic Bead Sensors Information and how they work

• Nemoto Tech

Infrared Sensors

• Dynament Application Note 0001

 
Gasses Information
The following links give some information about various gasses that Otis Instruments products can detect.  This information contains PEL, STEL, and IDLH information.  These links are for reference only and should not be used as a final decision on alarm set points.  Please consult your local federal and/or state authorizes for specifics on chemicals.

• NIOSH/OSHA/DOE Health Guidlines
• CDC Wordplace Safety & Health Topics

 
The Permissible Exposure Limit (PEL or OSHA PEL) is a legal limit in the United States for exposure of an employee to a chemical substance or physical agent. For chemicals, the chemical regulation is usually expressed in parts per million (ppm), or sometimes in milligrams per cubic metre (mg/m3). Units of measure for physical agents such as noise are specific to the agent. Permissible Exposure Limits are established by the Occupational Safety and Health Administration (OSHA).
 
A PEL is usually given as a time-weighted average (TWA), although some are Short Term Exposure Limits (STEL) or Ceiling Limits. A TWA is the average exposure over a specified period of time, usually a nominal eight hours. This means that, for limited periods, a worker may be exposed to concentrations higher than the PEL, so long as the average concentration over eight hours remains lower.
 
A Short Term Exposure Limit is one that addresses the average exposure over a 15-30 minute period of maximum exposure during a single work shift.
 
A Ceiling Limit is one that may not be exceeded, and is applied to irritants and other materials that have immediate effects.
 
* Wikipedia Entry