Greetings Oraculo...

On the site that Uhu mentioned, the Heng Long smoker is very similar to the one called "AristoCraft Smoke Unit". It has a wick and some kind of cotton-like material many refer to as "batting" in the bottom of the smoke oil tank. I have opened mine up and removed all but a small portion of the batting to improve the smoke output. It works very well now and puts out a lot of smoke.

As that site suggests, the oil is indeed vaporized by a heater element, usually a wire. It is also true that the smoker will fail if it runs out of oil because it overheats. That seems to be the main reason for HL smoker failure.

Your English is fine. [sm=thumbs_up.gif]

-Harq