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Alco-Sensor FST®

The Alco-Sensor FST is the industry's fastest selling Preliminary Breath Testing (PBT) instrument. We are fast approaching 200,000 of these instruments being used in the field, to date.
This evidential grade breath alcohol tester produces precise, accurate, and repeatable results on direct breath sample testing. It also offers a simple passive breath testing procedure for fast screening of multiple subjects, as well as the capacity to “sniff” alcohol in an open container by measuring the headspace over the liquid.

Features Include:

  • Intoximeter’s reliable top-of-the-line integrated fuel cell technology
  • Patented rear-facing design for operator safety
  • Simple, intuitive operating procedure
  • Direct or passive breath testing
  • Durable, constructed of rugged ABS/polycarbonate blend material
  • Backlit LCD display, with optional multicolor backlit display
  • Lever and snap mouthpiece with illuminated mouthpiece guide
  • Impact resistant SureGripTM protective sleeve
  • Magnets on each side of instrument, to protect against loss of instrument
Analytical SystemElectrochemical Sensor (Fuel Cell)Utilizes an Intoximeters electrochemical fuel cell sensor which generates an electrical response that is proportional to the Breath Alcohol Concentration in the provided, fixed volume sample. The fuel cell sensor is highly selective for alcohol. It does not respond to acetone or other substances found in the human breath after a fifteen minute deprivation period.
Measurement Types Direct Test / Manual Sample

Direct Test / Automatic Sample

Passive Test / Manual Sample

Passive Test / Automatic Sample

Headspace Test / Manual Sample

Measurement Range0.000 to 0.440 g/210LCustom ranges and units of measure are available.
Accuracy and PrecisionHighly accurate and precise evidential grade resultsMeets the NHTSA model specifications for Evidential Breath Test Devices.
Environmental LimitationsInstrument Temperature


Operates in a wide range of temperatures


 Ambient HumidityOperates in a wide range of humidities.
 PressureOperates in a wide range of atmospheric pressures.
MouthpieceDirect SampleThe Intoximeters designed mouthpiece provides both a “lever and click” alignment for simple installation and provides a tested and proven mouthpiece that produces accurate and repeatable results. 
Passive SamplePassive Cup adapter
Headspace SampleDrink sniffer adapter
Visual OutputDisplayEasy to read backlit, multi-colored graphic display and lighted mouthpiece guide
Audio OutputToneAudible tone to support visual messaging
Data StorageLast TestLast test recall
Power OptionsDisposable Batteries2 x 1.5V AA alkaline batteries
Optional Rechargeable Batteries2 x AA rechargeable batteries (battery charger sold separately)
Case ConstructionInstrumentABS/Polycarbonate with a yellow rubber Sure-Grip sleeve. The Sure-Grip sleeve is also available in blue or black, upon request. 
Carrying CaseBlow molded plastic case is provided in standard package
PhysicalInstrument Dimensions4.75″ x 2.75″ x 1.75″
 Instrument Weight (with batteries)0.47 lbs.
Standard Carrying Case Dimensions7″ x 3.5″ x 9″
Standard Carrying Case Weight (loaded)1.3 lbs. 
ApprovalsApprovalsNHTSA (US DOT) EBT. Inquire for list of approved US states or certifications in countries outside of the USA. CE Mark
Standard Package IncludesStandardeManual, 10 Mouthpieces, Access to online web-based training
TrainingStandardAccess to online web-based training with instrument serial number 


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