EMV models are designed with a stainless steel screen covering the heated elements that protects the operator from shock hazards due to spills or flask breakage. Durable polypropylene housing is chemically resistant. Unique patented airflow through ventilation slots beneath and around the rim of the case ensures a low, cool temperature. Built-in electronic controller regulates heating element from ambient to 450°C. Coiled heating element is suspended within a thermal insulating cartridge to provide maximum heat transfer and support. Replaceable cartridge is used for the heating element.