Hydrocarbon Gas Imaging Infrared System (Camera) 3.1.1.1 The camera must operate in the mid-wave spectrum (minimum of 3 to a maximum of 5µm). 3.1.1.2 The camera detector/filter must be cooled. Cameras using “uncooled” detectors are not acceptable due to decreased sensitivity. 3.1.1.3 The camera must be capable of detecting, at a minimum, the following hydrocarbon gases: • Methane • Ethane • Propane • Butane 3.1.1.4 The spectral range of infrared radiation measured by the camera must overlap with a major absorption peak for the chemical target of interest, meaning the camera must be sensitive with a response factor of a minimum 0.25 when compared to the response factor of propane for the desired detectable gaseous emissions composition. 3.1.1.5 The camera must be capable of detecting (or producing a detectable image of) methane emissions of 17 grams per hour (g/hr) and butane emissions of 18.5 g/hr at a viewing distance of 2 meters and a delta-T of 5 °Celsius (C) in an environment of calm wind conditions with a maximum of 1 meter per second (m/s). 3.1.1.6 The camera must be powered by battery with a minimum run time of 3 hours per battery and include a minimum of 3 field replaceable batteries. 3.1.1.7 Detector resolution must be a minimum of 320 x 240 pixels. 3.1.1.8 The camera 30 mm lens must have a field of view of 18.5o x 13.6o with a minimum focus distance of 1.0 feet and the ability to accept other lenses...
