Orange County Breathalyzer Machine

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Orange County Breathalyzer Machine

Orange County Breathalyzer Machine

DUI Breath Testing - AlcoSensor IV Breathalyzer

By far, the most popular Orange County Breathalyzer Machine is the Alco-Sensor IV, by Intoxometers, Inc.  All law enforcement agencies in Orange County have their breath devices maintained and calibrated by one agency – the Orange County Crime Lab.

This device is soon to be replaced (in 2016, and into 2017) by the Alco-Sensor V.

The Alco-Sensor IV with Memory provides a method of determining breath alcohol concentration, with the ability to store test results for easy retrieval by law enforcement, or for DMV hearings after a DUI arrest.

Evidential grade breath test results are stored to the on-board memory for printing or a later transfer to a computer-based centralized database program.

Features Include:

  • Intoximeter’s fuel cell technology
  • Automated, software driven breath testing protocol
  • LED display, providing step-by-step instructions for fail-safe alcohol testing
  • Automatically samples deep lung breath
  • Standard three digit readout. Also available in 2 and 4 digit readouts where required
  • Stores test records to memory
  • Capable of printing test results (with optional printer)
  • Mouthpiece release feature eliminates operator contact with a used mouthpiece
  • Easy operation, with mouthpiece powering the instrument “on” and “off”

Orange County Breathalyzer Alcohol Sensor IV accuracy, like any breath alcohol testing instrument should be checked periodically.  For the Intoximeters Alco-Sensor IV with Memory instrument, this is accomplished by running a standard with a known alcohol concentration through the instrument’s sampling system and verifying that the result is within an acceptable tolerance range of the expected value of the standard.  This procedure is called an “accuracy check” and is sometimes referred to as a “calibration check” because it is a test (check) of proper calibration.  If the result is within the acceptable tolerance defined in a Quality Assurance Plan (QAP) designed for the Orange County testing program, the device is considered accurate.  If the result is outside of the acceptable tolerance, the device is not providing accurate readings and therefore needs to be calibrated immediately.

The equipment used to perform accuracy checks and calibrations is referred to as “calibration equipment” and the manufacturer provides everything needed to maintain the accuracy of this testing device.

Calibration / Accuracy Supplies with a known quantify of alcohol used for testing to make sure they read a .10%, as calibrated.

For information on the Defenses to DUI Breath Cases, see our detailed article on the subject.  

If you need the help of a qualified DUI Defense Lawyer in Orange County, then Contact us, or call (877) 942-3090, anytime.


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