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.
Best Answer: STP is Standard Pressure and Temperature, where pressure equals 1 atm and temperature equals 273 K. The other answer is right too, there are different ways in which STP is used, I'm just using the definition I learned in college. Standard Conditions For Gas Measurements. NIST uses 20C and 14.696 psi, but use is not widespread. The International Satandard metric conditions are 15C and 101.325kPa; These conditions are used extensively for gas sales in S E Asia.