======  Aerodynamic Particle Sizer (APS) ======
  * Description: Measures particles from 0.5 to 20 um.
  * Manufacturer: TSI Incorporated
  * Manufactured Data: October 2009
  * Manufacturer: [[https://tsi.com/products/particle-sizers/supermicron-capable-particle-sizer-spectrometers/aerodynamic-particle-sizer-aps-3321|Web Site]]
  * Manufacturer Spec Site: [[https://tsi.com/getmedia/7fd20aa0-8540-4b8d-8572-d164366dd08c/3321-Spec-Sheet-US?ext=.pdf|Link]]
  * Model 332100
  * Serial Number: 7940078