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Nitric Oxide (NO, also known as Nitrogen Monoxide, is an important intermediate in the chemcal industry and a by-product of combustion of substances in air.

Typical applications where dangerous levels of Nitric Oxide might occur and benefit from a Nitric Oxide gas detector are:

• Power plants
• Semiconductor industry
• Ammonia production

Exposure Limits (Source: OSHA)

Following are Nitric Oxide exposure limits that industries should be aware of when researching Nitric Oxide gas detectors and gas detection systems.

• Agency	Exposure Limits
  OSHA PEL (General Industry)	25 ppm TWA
  OSHA PEL (Construction Industry)	25 ppm TWA
  OSHA PEL (Maritime)	25 ppm TWA
  ACGIH TLV	25 ppm TWA
  NIOSH REL	25 ppm TWA
  NIOSH IDLH	100 ppm

  Definitions:

  • TWA = Time Weighted Average exposure concentration for a normal 8-hour workday and 40-hour workweek
  • STEL = Short Term Exposure Limit (Usually a 15-minute time-weighted average exposure that should not be exceeded at any time during a workday
  • NIOSH (National Institute for Occupational Safety and Health)
    • REL = Recommended Exposure Limit
    • IDLH = Immediately Dangerous to Life or Health Concentration
  • OSHA (Occupational Safety and Health Administration)
    • PEL = Permissible Exposure Limit
  • ACGIH (American Conference of Government Industrial Hygienists)
    • TLV = Threshold Limit Value

Sierra Monitor has a 4-20 mA Nitric Oxide gas detector.

• Model 5100-19 gas detector utilizes electrochemical technology to detect levels of Nitric Oxide in the range 0 to 20 ppm.
• Model 4101-19 gas detector utilizes electrochemical technology to detect levels of Nitric Oxide in the range 0 to 20 ppm.