ASTM D5156

ASTM D5156 is a technical standard for continuous measurement of ozone in ambient, workplace, and indoor atmospheres using ultraviolet absorption. It helps define a consistent approach for monitoring ozone levels where air quality and exposure control matter. As an ASTM standard, it supports more reliable measurement practices for laboratories, environmental monitoring programs, and workplace safety efforts that depend on accurate ozone data.

What is ASTM D5156?

ASTM D5156, Standard Test Methods for Continuous Measurement of Ozone in Ambient, Workplace, and Indoor Atmospheres (Ultraviolet Absorption), describes test methods for measuring ozone continuously by ultraviolet absorption. The standard is intended to guide users who need dependable ozone monitoring in air environments where concentrations may change over time. It is typically used as a technical reference for measurement consistency, method selection, and quality-oriented monitoring practices.

Where is ASTM D5156 used?

This standard is commonly used in air monitoring applications where ozone must be tracked in real time or over extended periods. That may include ambient air monitoring, workplace exposure assessment, and indoor air evaluations. It is also relevant to organizations using ultraviolet absorption instruments for continuous ozone measurement, including environmental testing programs, industrial hygiene workflows, and facilities focused on air quality control.

Why is ASTM D5156 important?

ASTM D5156 matters because continuous ozone measurement requires a clear, consistent method to support trustworthy results. Using a recognized standard can improve comparability across instruments, locations, and test programs. It also supports compliance efforts, data quality control, and procurement decisions by giving buyers and users a defined technical basis for evaluating ozone monitoring performance. For routine monitoring, that consistency can help reduce uncertainty and operational risk.

• Continuous ozone measurement by ultraviolet absorption
• Applicable to ambient, workplace, and indoor atmospheres
• Supports air monitoring and exposure assessment
• Useful for instrument evaluation and quality control
• Helps promote consistent test and reporting practices