News. 1  Proctorâs and Paceâs Chapel joined to make one church. 2  Prepare for the unexpected repair bill. 3  Managing your spring allergies.  Health 1  Inspections. âItâs our people that make the differenceâ.  MADSOCIAL: Women of the Frontier returns to Fort 1  Boonesborough. Daniel Boone memorabilia collection  opens.
A micrometer is a measurement device incorporating a calibrated screw used widely for precise measurement of small distances in mechanical engineering and machining as well as most mechanical trades. The first micrometer was developed by Jean Laurent Palmer of Paris in 1848.
A micron is a unit of linear measure in the metric system used to measure distance from one point to another. The particles and contaminants that we are trying to filter out are far smaller than can be seen with the naked eye, magnifying glass or even a low powered microscope.