The NHxR will interest research labs (academic, industry, agency labs), regulatory agencies (local, state, national agencies), and agriculture, specifically intensive husbandry and poultry operations. The NHxR will be commercially accessible (pricing comparable to typical air quality analyzers) requiring low technical expertise and minimal maintenance and calibration time. The envisioned applications are stationary air monitoring and mobile monitoring on automobiles and/or small airplanes. Commercial agricultural interests include stationary applications in enclosed cow and poultry sheds where concentrations can be far higher than outside ambient - with just the NH3 load (neglecting NH4+) reaching 8 ppm in cattle houses, to 18 ppm in pig houses and to 30 ppm in poultry houses in Northern Europe. Human exposure limits are 25 ppm. Industry trends are for greater agricultural animal density, intensifying these problems. Although workers can wear masks, animals inhale the full atmospheric NHX load. Current analyzers are negatively biased, missing the NH4+ load. An NHxR-CEAS could actively modulate exhaust fans, thus improving worker conditions and livestock health and productivity. Other NHxR opportunities include industrial stack emission monitoring (power plants, refineries) where ammonia is a waste product, but are not a first focus. Other opportunities exist by extension to other sticky gases, such as nitrogen dioxide / nitric acid and sulfur dioxide / sulfuric acid.
A number of NASA satellite platforms are focused on aerosols for which the NHxR can help understand formation mechanisms as well as improving our understanding of the relationship between space-based NH3 retrievals from satellites like AIRS and IASI to total atmospheric ammonia (NHx) load, which is the parameter that impacts ecosystems. Current NASA orbital instruments measuring aerosol products include MODIS, VIIRS, CALIPSO, etc., which will be added to by future missions such as PACE and candidate missions like HySpIRI. In all cases, better understanding of aerosol formation mechanisms and size distributions will improve interpretation of satellite-derived aerosol optical depth, the relationship between environmental controls and aerosol formation (which impacts all other satellite products via atmospheric radiative transfer corrections) and ecosystem impacts. Additionally, there could be future planetary applications. For example, future Titan atmospheric explorer missions where NH3 plays an important role in aerosol formation or even Jupiter's Great Red Spot where NH3 also is proposed to form aerosols. After miniaturization of the NHxR design, it could play a role in future space missions as a front end to a CEAS or other planetary science analyzer.