Undercases, fixed under the analyser transport case, are a practical accessory to store and transport a raw of working tools needed by adjustments & controls of combustion plants. Many users even created their own tools set gathering those used by fuel oil-fired or by gas-fired plants and simply dock the one or the other undercase to the analyser depending on the type of heatings they will many handle the day. Sets for Heating Check as well as for TRGI measurements fitted in undercase are also available for various ecom analyser models.