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Gas Sensing Metrology Group

The Gas Sensing Metrology Group is responsible for developing, critically evaluating, and applying techniques for the identification and measurement of gaseous species in atmospheres (urban, rural, and pristine) and process streams (automobile and stack).

The group applies these techniques to certification of gas standards in support of industries responding to U.S. and state regulations, environmental concerns, fairness in trade issues, and global climate change.  The primary concern is to provide the infrastructure for high-quality, traceable gas measurements, allowing better decision-making by industry, regulators, government officials, research scientists, and the public.  Measurement services are provided through the development of reference materials including NIST Traceable Reference Materials (NTRMs), Reference Materials (RMs), Standard Reference Materials (SRMs).


News and Updates

Projects and Programs

Audit of EPA Protocol Gas Suppliers

EPA Protocol gas mixture calibration standards are obtained by users to measure emissions of regulated gaseous species to ensure that they comply with US


Certification of NIST Gas Mixture Standard Reference Materials

Christina Cecelski, Kimberly Harris, Cassie Goodman, William A. Kimes, Philip Liu, Walter R. Miller Jr., Jennifer Carney
The Gas Sensing Metrology Group at NIST provides accurate, stable gaseous standards for use in various types of emissions testing and environmental monitoring

Environmental Protection Agency Blind Audit 2018

Christina Cecelski, Cassie Goodman, Jennifer Carney
The U.S. Environmental Protection Agency (EPA) conducted a blind audit of EPA protocol calibration gas mixtures produced by specialty gas manufactures. The

Tools and Instruments

Ozone Standard Reference Photometer

DESCRIPTION The Standard Reference Photometer (SRP) Program began in the early 1980s as collaboration between NIST and the U.S. Environmental Protection Agency



Group Leader

Office Manager