Interchangeable permeation or diffusion tubes are used to provide a constant output of toxic gas. This constant output is mixed with a much larger controlled flow of clean nitrogen or air, to generate an accurate concentration of the standard test mixtures.
Changing the dilution flow rate, the tube temperature, or the number of permeation tubes used, can vary the concentration output level. The instrument can also be adapted to produce a variety of compounds by installing the appropriate types of permeation tube or diffusion tube.
The permeation tube oven temperature is controlled at a set point of 30oC to 60oC.
The ES4050P is powered by an external 12VDC power supply or external 12VDC battery.