---
title: "How is the Rhode Island breathalyzer test challenged?"
description: "Defenses focus on the Intoxilyzer machine calibration windows, operator certification status, the 20-minute observation period (officer must observe you without leaving the room), mouth alcohol..."
url: https://riduiguy.com/faq-items/how-is-the-rhode-island-breathalyzer-test-challenged/
date: 2026-05-23
modified: 2026-05-23
author: "The RI DUI Guy"
type: faq
lang: en
---

# How is the Rhode Island breathalyzer test challenged?

Defenses focus on the Intoxilyzer machine calibration windows, operator certification status, the 20-minute observation period (officer must observe you without leaving the room), mouth alcohol contamination sources, and chain-of-custody for any breath sample logs. Each is a documented defense angle that can suppress the test result.

How is the Rhode Island breathalyzer test challenged?(https://riduiguy.com/author/riduiguy/)2026-05-23T02:36:17-04:00