Improvements
The Sentinel ll, unlike the Sentinel l, "requires less power, has a more modular frame design, which incorporates the compressor into the unit for easier installation and as a result, requires less space." It also "has a more ergonomic design, improved passenger interface and easier maintenance." According to the Transportation Security Administration's website, the machines "can be instantly updated through their vast information technology network to stay ahead of the curve."
The Guardian has been under development since 2001 but was introduced commercially after Entry Scan and The Sentinel. It improved the GE and Smiths Detection machines by providing a MS analyzer rather than IMS analyzer to do the sample analyses and detection. The National Academy of Sciences recommends the use of MS technology over IMS, calling it the "Gold Standard for resolving high-consequence analyses". The Guardian is the first and only trace portal machine that can perform shoe bomb detection as part of its scanning process, resulting in no removal of shoes is required. Most airports currently require passengers to remove their shoes, a common complaint about airport security hassles.
Read more about this topic: Explosives Trace-detection Portal Machine
Famous quotes containing the word improvements:
“A country whose buildings are of wood, can never increase in its improvements to any considerable degree.... Whereas when buildings are of durable materials, every new edifice is an actual and permanent acquisition to the state, adding to its value as well as to its ornament.”
—Thomas Jefferson (1743–1826)
“I was interested to see how a pioneer lived on this side of the country. His life is in some respects more adventurous than that of his brother in the West; for he contends with winter as well as the wilderness, and there is a greater interval of time at least between him and the army which is to follow. Here immigration is a tide which may ebb when it has swept away the pines; there it is not a tide, but an inundation, and roads and other improvements come steadily rushing after.”
—Henry David Thoreau (1817–1862)
“... these great improvements of modern times are blessings or curses on us, just in the same ratio as the mental, moral, and religious rule over the animal; or the animal propensities of our nature predominate over the intellectual and moral. The spider elaborates poison from the same flower, in which the bee finds materials out of which she manufactures honey.”
—Harriot K. Hunt (1805–1875)