insulation 28 insulation 28 may be nextel for example a braided insulation material available from 3m corporation which can withstand temperatures of about 2 200 degrees fahrenheit several sections of leak sensor 16 may be configured in various shapes and electrically connected in series an example of a detector circuit 30 shown in the block diagram of fig4 comprises an input circuit 35 which receives a signal on line 34 from lead wires 26 of leak sensor 16 shown in fig2 an electrical signal appearing or present on a given signal line may be referred to hereafter using the same reference as the signal line for example the signal on line 34 may also be referred to as 34 signal 34 34 input circuit 35 outputs a signal 36 to a breach circuit 40 and to a sensor circuit 50 if wire 20 of leak sensor 16 is fused open or short circuited to casing 14 by leaking fluid 13 sensor circuit 50 outputs a latched signal 54 to an and gate 60 if signal 36 is present when a powerup voltage pulse v p on signal line 56 is provided to sensor circuit 50 and gate 60 outputs a signal 61 if signal 54 is present when a signal 94 is received by and gate 60 from a timer 95 signal 94 from timer.