Measuring flask, 1000 ml, made of laboratory glass, with plastic stopper

Stainless steel burning protection 
The safest protection against burning of mash, when distilling, is a water bath still. But with directly heated boilers you must have devices that prevent burning with high security. The first step is to keep the thick components of a mash away from the heated bottom. This is achieved primarily by a mash strainer. But a mash strainer alone is not a 100% burning protection. If the liquid component of a mash still contains starch, the liquid can also burn. To find that out, you should either do an iodine starch test, or cheaper, put a small amount of the liquid mash in a small pot and do a burning test on the stove. If the small amount burns, precautions must be taken.
If you know that you do not use 100% ripe fruit, burn is likely. In this case, it is advisable to use an amylase, which converts residual starch into sugar. This not only reduces the danger of burning, but also increases the yield.
Nevertheless, you should perform the above-mentioned burning test after fermentation. If the sample still tended to burn despite using an amylase, in addition to the mash sieve for instance a mash bag, as we offer it here in different sizes. This can not only keep solid components off the ground, but also filter out residual yeast. The combination of amylase, mash screen and filter bag or filter cloth should prevent burning.

Aroma basket
Is not it just protection against burning, but that either, in Germany only for commercial applications, alcohol vapor flows through fruits or herbs to obtain an aromatized distillate, or steam distillations to produce hydrosol and essential oils to be carried out, which is also in Germany is allowed, one uses a height-adjustable aroma sieve. This is placed in a still above the neutral alcohol or water and filled with fruits, flowers or herbs and will be distilled.