The Atmospheric Pressure Ionization Mass Spectrometer (APIMS) is an in situ spectrometer manufactured by Process Insights. It has been used on aircraft, research ships, and field sites to measure ultra-high purity gases such as oxygen, hydrogen, carbon dioxide, carbon monoxide, methane, water vapor, and nitrogen. It employs Atmospheric Pressure Ionization (API) techniques and mass spectrometry to identify gas levels. APIMS provides results in about 1 second for each component and can detect less than 5 ppt, depending on the gas.

Instrument Details
- Spectrometer/Radiometer
- Earth Science > Atmosphere > Atmospheric Chemistry > Nitrogen Compounds > Molecular NitrogenEarth Science > Atmosphere > Atmospheric Chemistry > Carbon And Hydrocarbon Compounds > MethaneEarth Science > Atmosphere > Atmospheric Chemistry > Carbon And Hydrocarbon Compounds > Carbon DioxideEarth Science > Atmosphere > Atmospheric Chemistry > Trace Gases/trace SpeciesEarth Science > Atmosphere > Atmospheric ChemistryEarth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Water VaporEarth Science > Atmosphere > Atmospheric Chemistry > Carbon And Hydrocarbon Compounds > Carbon MonoxideEarth Science > Atmosphere > Atmospheric Chemistry > Oxygen Compounds > Molecular OxygenEarth Science > Atmosphere > Atmospheric Chemistry > Hydrogen Compounds > Molecular Hydrogen
- Troposphere
- 1 s
- Point
- N/A
- Currently unavailble
Currently unavailable
Currently unavailable
Process Insights - Extrel CMS
Currently unavailable
Currently unavailable
Unpublished
![]() P-3 Orion 28 Campaigns · 145 Instruments | TRACE Transport and Atmospheric Chemistry near the Equator 1992—2001 Brazil, Southern Africa, Tropical Atlantic, Central & Western Regions of the Pacific Ocean Basin 2 Deployments · 25 Data Products
| ||||||
![]() R/V Ronald H. Brown 4 Campaigns · 52 Instruments | ![]() Southern Ocean Gas Exchange Experiment 2008 Southern Ocean 1 Deployment · 0 Data Products
|