Police departments in many towns in New Jersey are now utilizing portable hand held breath testing devices known as preliminary breath testers, or PBT’s. A PBT can either report an actual breath test result in numerical format such as 0.08% breath alcohol, or it can simply show a positive or negative result, signifying whether alcohol is present in the breath or not.
The PBT’s are generally supposed to be used at the end of the investigation, and not as the basis to continue an investigation. The theory is that once the officer confirms the presence of alcohol, any subjective evidence collected thereafter, such as field exercises administered to the suspect and interpreted by the officer, may be tainted by the positive result on the PBT. Therefore, PBT’s are intended to be “confirmatory” devices once the officer has undertaken other subjective testing.
No one ever has to submit to a PBT roadside. The implied consent law, which states that a driver in New Jersey must submit to breath testing where an officer has reasonable suspicion that he or she is under the influence of alcohol, applies only to evidential breath testing on an approved machine, such as the Alcotest 7110 MKIII-C, which is the only approved evidential breath testing machine currently in use in New Jersey.
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