Nitrogen Dioxide Calibration Gas for Accurate Measurements

Nitrogen calibration gas typically refers to specialty gas mixtures that use nitrogen as the balance (carrier) gas, with a precisely measured concentration of an analyte gas such as NO2. These NIST Traceable standards are used to set the response of gas analyzers and detectors to a known reference point, ensuring accurate, repeatable measurements in environmental monitoring, industrial safety, and laboratory applications.

SpecGas Inc. produces NO2 calibration gas mixtures at both PPB (sub-ppm) and low PPM (1–100 ppm) concentration levels. Custom concentrations and tolerances can be blended to order, accommodating requirements from ambient air quality monitoring at trace PPB levels to OSHA workplace compliance testing at the 5 ppm ceiling limit.

NO2 calibration gas is available in disposable aluminum cylinders, disposable steel cylinders, refillable aluminum or steel cylinders, and nickel-plated cylinders. Disposable options (17–103 liters) are well suited for field and remote applications, while refillable high-pressure cylinders (58 liters for reactive mixtures) are ideal for laboratory and permanent monitoring installations.

NO2 calibration gas is required under numerous regulatory frameworks including EPA Method 7E and Method 320 for stack emissions, 40 CFR Part 75 Acid Rain Program CEMS calibration, EPA Performance Specification 2 (PS-2) for NOx analyzers, NSPS Subparts for diesel and combustion turbines, ambient air quality monitoring networks, and OSHA PEL/ceiling monitoring for workplace safety.

Yes. All SpecGas NO2 calibration gas mixtures are NIST Traceable, meaning their certified concentrations are tied to national measurement standards maintained by the National Institute of Standards and Technology. This traceability is essential for regulatory compliance, quality control audits, and instrument performance verification in environmental and industrial monitoring programs.

Yes. SpecGas Inc. offers full custom blending capabilities for NO2 and NOx calibration gas mixtures, including specific concentrations, balance gas selection (nitrogen, air, or custom), and multi-component mixtures. Custom tolerances can be specified to meet unique application or regulatory requirements. Contact SpecGas for a consultation with their expert blending team.