For many years the use of Electrostatic Surface Detection Systems (as Foster + Freeman’s ESDA) has been considered a standard in document examination. Along with Ozone from the Corona, produced during the development process, toner particulates are also released into the environment, especially when using the qualitatively better Cascade Developer method. Whilst this is still the optimum procedure for development of indented writing, local health and safety regulations may have changed over the years. Many larger laboratories already use exhaust cabinets. However, smaller labs and many private document examiners do not have access to such exhaust systems.
Attestor Forensics developed the Toner Particulate and Ozone Reduction System TORnado SF91 especially for this type of user. If the front or side flap is opened, a powerful fan is automatically activated (half speed) and creates an air stream above the document bed of the ESDA. Once the user switches on the ESDA, the fan speed is automatically increased to maximum. The air is then filtered through a stainless steel mesh and a particulate filter Type F9, a combination, specific for the Cascade Developer. An activated carbon fleece, integrated into the filter cassette reduces the ozone in the air stream.
The TORnado SF91 also performs a short filtration cycle at regular intervals when it is in stand-by mode, ensuring a safe environment for the user. For cleaning or to collect stray cascade beads, a catch tray can be pulled out without having to lift the heavy ESDA equipment.
The TORnado SF91 features a microprocessor system which communicates with the user via a touch panel display in the lid. It features a counter for the remaining filter life time and informs the user when a filter replacement is due. If the maximum filter capacity is reached, TORnado SF91 automatically switches off the fan as well as the power supply to the ESDA until a new filter is fitted. Unquestionably, TORnado SF91 is an invaluable contribution to health and safety at a document examiner’s workplace.