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Katz is out of the Bag:
  Katz�s Weaknesses & the  Rapidly Emerging Technology of Today and the Future.� 
Robert Keates������������ ����������������������� ����������������������� ����������� ����������� Spring, 2005
E.����������� Passive  Alcohol Sensors
����������� One of the latest tools in the fight  against drunk driving is known as the �Sniffer�. � Developed by PAS Systems, the Sniffer is a  handheld, battery powered flashlight with a built in alcohol sensor. � As the officer approaches the suspect�s  vehicle, and shines the light, the Sniffer tests the exhaled breath of the  driver, analyzing it for alcohol. � If present, the Sniffer alerts the officer  through a series of color coded lights, informing the officer of the  approximate blood alcohol level. � The Sniffer comes in several different  models, including a detector unit concealed on the edge of a police clipboard. 
����������� This device could be used to combat  the drunken driving problems that plague this country.� As for the current use of the Sniffer in the  states, the exact usage data is unclear.
F.�������� Mass  Spectrometry and Gas Chromatography
  While gas chromatography and mass  spectrometry have been used for many years to analyze the chemical and molecular  composition of various substances, recent trends of this technology have been  employed by law enforcement. � The EGIS Explosives Detection System (EGIS),  developed in the mid-1990�s, was able to detect minute traces of explosives in  the air by sampling a large volume of air around a person or luggage. � The EGIS was then redeveloped and dubbed the  �Sentor�, capable of detecting the chemical signatures of drugs instead of  explosives. � Priced at around $150,000,  the Sentor is a flashlight shaped sensitive filtering machine, which breaks gas  or liquids down into its molecular subcomponents. 
  The Sentor is currently used by the  FBI, the Drug Enforcement Agency, and United States Customs. � It has been tested in numerous cities,  including San Diego, California. 
Jennifer Hartunian, To Breathe, or Not to Breathe: Passive Alcohol Sensors and the Fourth Amendment, 39 San Diego L. Rev. 563, 564 (2002).
Iraola, supra note 160, at 12; see also https://www.airport-technology.com/contractors/security/thermo/thermo2.ht