What does the term "certified evidential instruments" refer to?

The term "certified evidential instruments" refers to standardized testing equipment that has been approved and validated for use in law enforcement and legal settings to measure blood alcohol concentration (BAC). These devices, such as the Intoxilyzer 9000, are subject to strict calibration and maintenance protocols to ensure they provide accurate and reliable results.

Standardized testing equipment is held to specific regulatory standards and undergoes rigorous testing and certification processes. This ensures that the data obtained from these instruments is admissible in court and can serve as evidence in DUI cases. By utilizing certified evidential instruments, authorities can confidently enforce intoxication laws, knowing that the measurements are reliable and scientifically validated.

In contrast, other options like unapproved testing devices, home testing kits, and personal breathalyzers may not meet the necessary standards for accuracy and reliability required in legal contexts. These alternative devices are often not regulated and can vary greatly in performance, making them unsuitable for formal evidential use.