The range of laboratory appliances with electronic controllers comprises two refrigerators and two freezers with spark-free interior for storing explosive and highly flammable substances - for instance in the chemical industry or in special laboratories. The interiors of the appliances are in compliance with the safety requirements of the EU Directive 94/9/EC (ATEX 95) and have been tested to the EN 1127-1, IEC 60079-0 and IEC 60079-15 standards by electro-suisse SEV (Swiss Association for Electrical Engineering, Power and Information Technologies), the ATEX conformity evaluation organisation.