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Mole Sieve Probe

Where to Use

  • Natural Gas Processing: In Molecular Sieve Adsorption Beds Upstream of Moisture and/or Mercury Analyzers

  • LNG Trains: In Molecular Sieve Adsorption Beds Upstream of Moisture and/or Mercury Analyzers

Sample Control        

Prevent moisture or mercury from damaging downstream equipment and shutting down your process–detect breakthrough in your molecular sieve adsorbent bed by sampling the gas stream with Welker’s Molecular Sieve Probe.

The Molecular Sieve Probe mounts directly to a mating flange on the bed and extends across the inner diameter of your dehydration unit (DHU) or mercury removal unit (MRU) to sample natural gas from the full width of the bed. The water or mercury content of the samples is monitored by the connected downstream analyzer to alert the operator of rising levels and the need for molecular sieve regeneration.

Multiple Molecular Sieve Probes can be installed in a DHU or MRU in a multilevel configuration to monitor molecular sieve deactivation across the height of the bed.


  • 316/316L stainless steel
  • Electropolished and Dursan®-coated wetted parts
  • NACE compliance
  • Johnson Screen Vee-Wire® filter element probe overlay


  • Durable construction for improved equipment longevity
  • Minimize corrosion, absorption, adsorption, and chemical reactivity
  • Effectively remove contaminants and moisture from pipeline gas for use as seal gas
  • Non-clogging filter prevents particulates and molecular sieve from entering the sample pathway
Mole Sieve Probe
More Information
Materials of Construction : 316/316L Stainless Steel
Maximum Allowable Operating Pressure : 2" – 600 ANSI RF: 1480 psig @ -20 °F to 100 °F
2" – 1500 ANSI RF: 3600 psig @ -20 °F to 100 °F
Process Connection : 2" – 600 ANSI RF
2" – 1500 ANSI RF
Others Available
Features : Electropolished Wetted Surfaces
Johnson Screen Vee-Wire® Filter Element
Manual or Actuated Closure Valves
NACE Compliance
Sulfinert® Coating on Wetted Parts
Multiple Joint Probe Configuration
Valve Orientation
Weight : 1 lb

Weight and/or dimensions are approximate.

Specifications subject to change without notice.

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