Accurate measurements of gases require gas samples withstable dew points even under harsh ambient conditions.The EGK models provide a compressor-type cooling systemconnected to a cooling block. The cooling block evenlydissipates the heat thus supporting the highly efficient heatexchangers. The temperature of the cooling block isregulated by the .This system allows smooth regulation and eliminates thedisadvantages of the traditional on-off operating mode.The cooling block accommodates either a single stream or adual stream heat exchanger hence the cooler may serve twoseparate sample gas streams.Condensate is removed either by peristaltic pumps, by automatic condensate drains or condensate vessels.

The energy content of the sample gas and, as a result, the required cooling capacity of the gas cooler is determined by 3 parameters: gastemperature , dewpoint (moisture content) and flow v. The outlet dew point rises with increasing energy content (heat) of the gas. Therequired cooling capacity is determined by the maximum acceptable level of the outlet dew point.

The following table shows cooler performance assuming the following conditions: =120°F and =160°F. Indicated is the v in lpm cooled air(i.e. after the moisture has condensed). If the actual values stay below the parameters and , v can be increased. For example (TG), insteadof = 120°F, = 160°F and v = 5.7 lpm the values =105°F, =160°F a maximum flow rate of v=7.1 lpm could be achieved.