Very low pressure is expressed in microns (μ), which is equal to ____________ mm of Hg column (absolute) at 0°C? March 5, 2019 – by admin Very low pressure is expressed in microns (μ), which is equal to ____________ mm of Hg column (absolute) at 0°C? A. 0.0001B. 0.001 C. 0.01 D. 0.1