External sample gas conditioner

Order-Nr.  0554 3501

  • Reduction of flue gas moisture resulting in improved accuracy & sensor life

  • Rugged and designed for long life by using high quality acid resistant materials

  • Small, lightweight & efficient with sophisticated gas path 

  • Fast operation thanks to easy connection and start-up

You can rely on accurate measurement results, even when carrying out measurements on very humid flue gas. With the gas cooler, you can easily minimize measurement inaccuracies due to water vapour.

Contact Testo directly to be put in contact with your local Authorized Emissions Distributor - info@testo.com - 800-227-0729


Product Description

Easy and reliable external gas conditioning: use the gas cooler to ensure optimum preparation of very humid flue gas for measurements with the compatible measuring instrument (please order separately).

Water vapour is cooled in the gas cooler until it condenses. The resulting condensate remains in the gas cooler. The conditioning process minimizes leaching effects and prevents dilution of the measurement gas. This gives you more accurate measurement results when analyzing flue gas with the compatible measuring instrument.

Delivery Scope

External sample gas conditioner, mains unit, adapter cable for power bank, 2 x rubber bands for holding the power bank in place, chain for mounting external gas conditioning unit or flue gas analyzer, carry case, instruction manual.

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Technical Data

General technical data


19 oz. / 550 g


4 x 22 x 3 in. / 100 x 558 x 70 mm

Operating temperature

23° to 122 °F / -5 to +50 °C

Protection class


Power supply

Mains unit 5 V / 4 A, alternatively powerbank USB 5 V min 3 A output (minimum requirements of powerbank)

Entry dewpoint

Min. 10 K dewpoint distance

Cooling temperature

Standard temperature +10 °C (min. 10 °C below surroundings)

Meeasurement period

until condensate trap needs to be emptied:; 2 h (at +60 °C entry dewpoint and 1 l/min for testo 350); 3 h (at +45 °C entry dewpoint and 1 l/min for testo 350)

Storage temperature

-4° to 122 °F / -20 to +50 °C