Alarm sensitivity range from 0.001% to 20% obscuration/m (0.0003% to 6.10% obscuration/ft). Classified as a 'very early warning smoke detectors' and can reliably detect fire at an early stage, and low to high concentrations of smoke. As a multi-channel system, the IFT-15 detector is able to divide a protected space into sampling sectors, enabling the localisation of a fire for faster incident response. The detectors are configurable for a variety of environments, providing ideal fire detection solutions for cabinets, EDP rooms, prisons, historic houses, custody suites, museums and art galleries.