Looks like a piece of lab equipment that a specimen, sample or etc. is placed inside of it and then a gas is pumped/forced into one port and out the other port.
If so, then the question is, …… is the purpose of the gas to cause a change in/of the “sample” (dry it, moisten it, color it ??) ….. or is the purpose of the gas to extract something from the “sample” (nebulizer action) and transport that vapor to where it is used?