A lens module includes a lens barrel, a first lens, a second lens, a third lens, and two spacers. In accordance with some embodiments, a frame providing a bridge and defining a transport region and a deployment region is slidingly connected to a mast. The curved portion also protects an end of the ceramic envelope from any build-up of metallic arcing products and eliminates the need for elaborate fixturing during assembly. The difference between the detected rates as compared to a leak threshold value, and the microprocessor is adapted to generate a valve shutoff signal in the event the detected difference in flow rates exceeds the leak threshold value. Processing a signal into a TDMA and a CDMA, Time Constrained Signal waveform shaped and Long Response filtered signal. The response signal is modified by the palladium nanocluster film due to a change in conductivity of the palladium nanocluster film upon exposure to hydrogen.