Model FS20X™ Multi-Spectrum Fire and Flame Detector - (IR/IR/UV). The new Model FS20X is the latest generation high technology Multi-Spectrum (IR/IR/UV/Visible) Fire and Flame Detector, which is part of our FSX family of advanced technology Electro-Optical Fire Detectors. Based on the foundation of highly successful and reliable SS4 detector, the new FS20X Detector represents a quantum leap in integrating Infrared and Ultraviolet sensing technologies. The FS20X is a Multi-Spectrum IR/IR/VIS fire and flame Detector with the addition of a proven UV solar-blind sensor. The FS20X exhibits faster, false-alarm free response to fires over a wider temperature range and with a much longer detection range compare to conventional UV/IR detectors. Solar blind 90 degree cone of vision and detection range greater than 200 feet. Note: A swivel mount should be offered with every Flame Detector Kit.