Gas & Smoke Aspirator Systems

Source: Emerson

The sample being measured is pulled under an adjustable vacuum created by an air driven eductor. Flow rates are controlled by an integral needle value with the velocity being indicated on a flow meter. The sample is passed across the sensor and exhausted, along with instrument air, via the exhaust port. If the aspirator is positioned in a “safe” area, it is advisable to pipe the exhaust back to the area it has come from. Sample line dross can be cleared by pressing the line purge button, diverting full pressure instrument air down the sample line.


  • Easy, quick, and economical maintenance
  • Choose any detector
  • Samples can be drawn from negative pressure areas
  • Monitor for sample line blockages
  • Suitable for sour gas applications
  • Fail safe sample line clearance and detector testing
  • Can be utilized in high temperature applications
  • Can be used in low temperature applications


  • Ingress of flammable gas, toxic gas, and smoke into HVAC ducts
  • Flammable gas in riser caissons
  • Protection of safe refuges
  • Flammable gas entering combustion air, ventilation air intakes and ventilation exhausts of gas turbines
  • Flammable gas leaks under acoustic enclosures of gas turbines
  • Flammable gases in moonpool areas and turret annulus spaces in FPSO’s
  • Leaks from the gas seals of gas compressors
  • Hydrocarbon break-through in nitrogen blanketed expansion vessels
  • Flammable gases in subsea depressurization tanks and crude oil storage tanks
  • Gas build up beneath gas tight floors
  • Hydrogen sulfide in drilling areas
  • Gas build up in cargo holds and ballast tanks
  • Gases in low or high operating temperatures