Gas Cooler Calculator

Many areas applying extractive Gas analysis or dry basis measurement systems such as air emission testing equipment, CEM monitoring and stack test equipment, EPA method test equipment, process gas analysis and others, the sample gas needs to be ‘dried’ before it is fed into the analyser.

The sample drying is achieved by cooling the gas down below dew point. Consequently, any moisture will be condensed and removed from the system.

It depends highly on the gas composition or gas compositions and the ambient conditions, as they may vary significantly in CEM sampling, source testing or for example engine emission test, requires application specific cooling equipment. Thermoelectric chillers have their own strength and weaknesses, so have compressor chillers using a fluidic coolant.

Bühler Technologies is applying both technologies. The coolers are equipped with a cooling block in which heat exchangers are inserted. These heat exchangers are avalible in materials like stainless steel, duran glass or PVDF, with one or two individual gas paths. The temperature of the cooling block is regulated by the Bühler constant control system providing a very stable dew point even under varying ambiend conditiones. The coolers are maintenance free.

The product range includes coolers for hazardous areas (Atex Zone 1 and 2) and water cooled heat exchangers.

For condensate removal either peristaltic pumps or automatic condensate drains are available. Further accessories are available upon request; see respective data sheets for options.

As high energy efficiency is a major concern, modern calculation methods and system design is an inevitable request.

Use our Gas Cooler Calculator for proper selection.



Sample Gas Coolers

  •  Peltier coolers for an ambient temperature up to 122 °F
  •  Compressor coolers with different capacities and up to 4 seperate gas streams
  •  Compressor coolers with ATEX certificate


  • Peristaltic pumps with protection housing as stand alone product, or for panel mounting
  • Condensate vessels with different dimensions
  • Automatic condensate drains


Water Cooler

  • Materials: SS, PVDF
  • Inlet temperature max. 320°F
  • Suitable for use in hazardous areas

Datasheet (225 kb)

Pre Cooler TS10

  • A pre cooler for samples with high load of humidity upstream of the main cooler
  • Low maintenance
  • Very easy to install
  • Integrated condensate pump

Datasheet (181 kb)Instruction manual (996 kb)

Pre Coolers

  • For high dewpoint applications
  • Materials: SS, PVDF
  • Centrifugal separator with demister for removing condensate and particulates from the sample

Datasheet (922 kb)

Moisture Detector

  • Extremly fast indication of water slip
  • Pressure rating up to 40 bars
  • Version with broken wire detection
  • Controllers for wall mounting, railmounting and for 19" support
  • Intrinsically safe version available

Datasheet (985 kb)Instruction manual (1,382 kb)