A heat exchanger has a shell and tube stack disposed within a shell inner chamber. For example, for a hybrid powertrain system equipped with an electrically variable transmission, three signals are monitored. Oxygen diffuses through the membrane into the liquid reduction-oxidation catalyst solution whereby the solution is oxidized and can be recycled for further us in a desulphurization process. Game data may be input into the software application and uploaded to a remote database by way of a wireless network. The ultraviolet light is then irradiated to an entire surface of the ultraviolet curable resin to finalize the adhesion. In this manner, a first diode can have a first breakdown voltage, a second diode can have a second breakdown voltage, a third diode can have a third breakdown voltage, etc.