The PGU-OEM-H2 consists of two modules in one enclosure. It is predesigned for the use with our double cell for investigation of the hydrogen permeation. One module is for the charging side while the other one is responsible for the hydrogen permeation measurement. The idea of this design is the double galvanic isolation of the modules and the low noise setup by reducing cables and other parts which can catch disturbance from the environment. This is very important for hydrogen permeation measurement. Any leakage current between the devices on additional ways than via the electrochemical cell distorts the measurement result. By testing materials that are high resistant against hydrogen permeation for example, the expected permeation current is in a range of 5…10nA. Any leakage current could be higher if it is present.

The devices include a built in measuring and automation system, the EcmWin measuring software and the evaluation software EcmView. The modules can also work complete separate for different experiments. For hydrogen permeation measurement, the devices are managed by the software. It manages the start/stop of the galvanostat when permeation will be undershot /exceed. So a permeation measurement can be predefined and run completely automatic. This method can be cycled and run as long as necessary.

The connection to the computer is established via USB or Ethernet. The measuring module works with 24 bit A/D converters while the scanner works with 26 bit (step size 330nV).