Chemical pollution happens when certain compounds are improperly disposed of. This can affect the environment by disrupting the processes of the ecosystem. Chemical pollution happens when certain compounds are improperly disposed of. This can affect the environment by disrupting the processes of the ecosystem.
Options + NIST Calibration Certificate Order Code: /C - NIST (National Institute of Standards and Technology) Certification of Calibration states that the pressure gauge was tested at multiple test points and is within its stated tolerance of accuracy. Gauge is shipped with a sticker on the side of the gauge noting the certification number and date, and NIST certificate. Dual Scale Dials US Gauge offers most pressure ranges in dual scale, such as psi & kPa, psi & BAR, psi & kg/cm2, or single scale metric such as kPa, kg/cm2, or BAR.
NIST is a non-regulatory federal agency founded in 1901 within the U.S. Commerce Departmentâs Technology Administration whose mission is to develop and promote measurement, standards, and technologies to enhance productivity, facilitate trade, and improve the quality of life of Americans.ith NIST traceable calibration, any measurements taken with a certified thermometer will have: 1  An unbroken chain of measurements that leads back to NIST maintained standards. 2  Known and documented uncertainties for each step in the chain.