The Thermo Scientific* Zero Air Supply, Model 111 is designed for applications where pollutant-free levels of NO, NOx, O3, SO2, CO and hydrocarbons are required, with flows up to 20L/min. at pressures of 30psi. This model uses an external compressor; the pressure regulators, chemical scrubbers, reactor and temperature controller are all contained in a single convenient case.


  • Critical components are self contained
  • Limited Maintenance
  • Exceptional ease of use
1. Voltage Options:
  A = 120VAC 60Hz
  B = 220VAC 50/60Hz
2. Compressor Size:
  1 = No Compressor
  2 = 10L/min. Compressor


3 = 20L/min. Compressor
3. CO Reactor:
  N = No CO Reactor
  R = CO Reactor Setup
Compliance: ETL, CSA, UL, CE