International Space Station
Life Support Systems Safety

A key requirement of the long-term health and safety of personnel on the International Space Station is ensuring a sustainable living environment. One of the vital parts of the Advance Life Support Systems is the production of breathing oxygen for the crew. Makel Engineering is a major subcontractor to Hamilton Sundstrand on the Water Processor/Oxygen Generator (WP/OG) for Node 3.

Makel Engineering has developed a hydrogen sensing system that monitors the hydrogen levels in the space station’s oxygen regeneration system. The hydrogen sensor orbital replaceable unit (ORU) consists of a triple-redundant sensor package which measures hydrogen in oxygen background with high humidity levels. The ORU warns the safety systems well before hydrogen reaches explosive levels in the oxygen lines, enabling proper handling of the potential hazard and avoidance of accidents.

Makel Engineering’s hydrogen sensing system, utilizes three sensors working in parallel to provide the system a constant reading of current hydrogen levels. As part of this ongoing program Makel Engineering will provide service and support for these triple redundant units. The systems will return from the station to Makel’s calibration lab for regular recalibration - insuring the accuracy and reliability of the system for years to come.