The smokesabre is a major step forward in the design of smoke detector testers. All other pressurized aerosol smoke alarm testers have the inherent drawback that, if misused, they have harmful residue on the casing and/or inside the chamber of the detector. This residue can discolor the detector plastic, can attract dust, affect sensitivity and, in some cases, leads to corrosion, cracking or even complete failure of the detector. Residue occurs when testing aerosols are used too close to the detector, or smoke alarm, despite instructions not to do so.