Entegris Air Sampling Service

This unique air sampling system has solid-state traps for off-line AMC analysis. It provides end users of leading-edge lithography and inspection/metrology equipment with a dedicated, simple, and reliable tool for chemical filter certification and cleanroom air certification. These automated sampling systems can measure parts per trillion (pptV) concentrations of airborne molecular acids, bases, refractory and organic contaminants.

Our analytical sampling, analysis, and certification are compliant with lithography and inspection/metrology tool optics warranty certification requirements. 

For pressurized gas sampling, we recommend our Gas Sampling Service.

Air Sampling System


  • Internal pump pulls ambient or cleanroom air
  • Parts-per-trillion (pptV) volume sensitivity
  • No liquid impingers are required
  • Lower cost versus impinger because does not require a service engineer to setup
  • Compact design is easy to install, operate, and ship
  • Simple sample point
  • Quick-turn analysis

Sampling Steps

  • Entegris ships the air sampling system
  • Place in the test area and sample
  • When sampling is complete send system to Entegris Analytical Services
  • Entegris delivers an analytical report within five days


  • Lithography and inspection/metrology tool manufacturer cleanroom certification
  • Cleanroom and chemical filter certification
  • Gas piping and component outgassing validation

Featured Data Sheet

GateKeeper® GSS Microcontamination Inspection Service

Speciation and Typical Sensitivity

Based on four hour sampling, lower sensitivities can be acquired with longer sampling times. Detection limits are determined statistically, at 99% confidence.
Dedicated Contaminants DL (ng/L) DL (pptV)
Fluoride (F-) 0.066 80
Chloride (Cl-) 0.086 57
Bromide (Br-) 0.084 26
Nitrite (NO2-) 0.085 43
Nitrate (NO3-) 0.169 65
Sulfite (SO32-) 0.066 25
Sulfate (SO42-) 0.054 21
Phosphate (PO43-) 0.172 43
Acetate (C2H4O2-) 0.509 207
Formate (CHO2-) 0.171 91
Ammonium (NH4+) 0.074 100
Hydrocarbons (IPA to C30 as Toluene) 0.042 11
Retractions (as HMDSO) 0.042 11