This question applies to the legacy Photon camera models. The Photon product line and its accessories have been discontinued. The information here is provided for historical reference.
The original PathFindIR comprised a Photon/19mm lens in a sealed aluminum housing. The field of view was 36 degrees horizontal. A hermetic connector provided the electrical interface for input power and output video. For more information, refer to the PathFindIR page. The current PathFindIR II is based on FLIR`s Tau2 camera with a 13mm lens, which affords a 24-degree field of view.
There are also several Security & Surveillance products available that incorporate FLIR cores into environmentally sealed systems. Please refer to CVS Security Products for more information.