The digital gas mixer is used to produce specified oxygen concentrations (from compressed air and oxygen) or gas mixtures from a maximum of four gases. It is integrated as a modular assembly into various ventilators in pediatrics or into anesthesia devices.


seleon gmbh was responsible for the development, design and manufacture through to series production of the gas mixer. The aim was to increase the accuracy and safety of the gas mixer. Furthermore, costs were to be reduced by digitizing the mixing process. When integrated into respirators, the gas mixer must also provide a specified pressure or volume flow. It must meet the special requirements for safety and alarm functions in the pediatric field. The installation in different devices requires a compact and small design, the number of outputs varies. Installation should be simple and firmware updates must be possible at a later date.


The gas mixer is suitable for versatile use in various ventilators and anesthesia devices with different requirements and measuring ranges. The oxygen concentrations as well as the pressure and volume flow are adjustable. seleon’s extensive expertise and experience in the field of ventilator technology led to intelligent solutions during the development process, which resulted in a patent.

The entire development and production process of the device took place in-house at seleon and is manufactured according to the DIN EN ISO 13485 standard. The customer received the product developed according to his ideas and is the owner of the patent. Development and production were implemented in a cost-conscious manner. Repairs and service of the device are handled on behalf of the customer.