Bios is a recognized world leader in primary gas flow measurement. We provide products, services and solutions for professionals in diverse disciplines, including occupational health and safety, environmental protection, industrial process control, R&D and calibration laboratories.

We hope you’ll take the time to learn more About Bios and what makes us the preferred choice for people seeking the most accurate, reliable and convenient products in gas flow measurement. We have lots to tell you about the Proven DryCal® Technology that delivers easy-to-use, "dry" primary standards, and about our laboratory accreditation through the National Voluntary Laboratory Accreditation program (NVLAP) of the National Institute of Standards and Technology (NIST), which features Bios inter-laboratory comparisons with national and commercial laboratories around the world.