Liquid leak detection systems, and fuel cell systems and hydrogen-producing fuel processing systems containing the same. The liquid leak detection systems are adapted to detect liquid leaks from the fuel cell and/or fuel processing systems and to respond thereto, such as by interrupting the delivery...http://www.google.co.uk/patents/US7629067?utm_source=gb-gplus-sharePatent US7629067 - Hydrogen-producing fuel processing systems and fuel cell systems with a liquid leak detection system
