Microkiln (fermentation device, incubator)

I developed this device as a fermentation chamber for home-cured tobacco, but it has also proven effective as an incubator for the eggs of small reptiles. Insulation capable of withstanding temperatures of 60°C—such as mineral wool, polyethylene foam (Mirelon), or polystyrene—is placed between the outer container and the  insert. An 11W heating film, of the type used in terrarium keeping, is wrapped around the inner insert. Temperature is regulated by an STC-1000 thermostat, which operates on 220V mains voltage. Given this configuration, the builder must possess the necessary technical expertise to work safely with potentially lethal voltages; alternatively, a 12V version could be used, provided a suitable heating element is sourced. The cable entry point between the thermostat and the heating element must be sealed with epoxy resin or silicone to prevent moisture leakage. A standard 0.5-liter preserving jar (without its lid) is placed inside the insert. Ventilation is provided via an adjustable valve located on the lid. The lid itself must also be fitted with thermal insulation. Materials: PET-G, PCT-G, infill 20%, support - yes, 3 walls for 0.4 mm nozzle. The upper temperature limit of the fermenter depends on the properties of the material used, the heating element, and the insulation. For tobacco fermentation, the upper temperature limit is 55 degrees Celsius.