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Understanding Breathalyser Calibration
Breathalyser calibration is essential for ensuring accurate blood alcohol concentration (BAC) readings. Without proper calibration, breathalysers may provide incorrect results, leading to serious legal and safety concerns. Calibration fine-tunes the device, helping it maintain precision over time.
How Breathalyser Calibration Affects Accuracy
Breathalysers rely on chemical sensors to detect alcohol levels. Over time, these sensors degrade or become less sensitive, affecting the accuracy of readings. Regular calibration corrects these changes, ensuring that BAC measurements remain reliable and within acceptable limits.
Inaccurate readings due to poor calibration can have severe consequences. A breathalyser that overestimates BAC levels could lead to wrongful charges, while one that underestimates BAC might allow impaired drivers to remain on the road, increasing the risk of accidents.
How Often Should a Breathalyser Be Calibrated?
Calibration frequency depends on the manufacturer’s recommendations and usage patterns. General guidelines include:
Every 6 to 12 months for personal breathalysers.
Every month or after a specific number of uses for professional and law enforcement devices.
Immediate calibration if the device produces inconsistent readings or error messages.
Signs Your Breathalyser Needs Calibration
- Unusual or fluctuating BAC readings.
- Sensor error messages or warnings.
- Excessively high or low readings compared to expected levels.
- Slow response time when processing results.
Maintaining Reliable BAC Readings
To ensure breathalyser accuracy:
- Follow the recommended calibration schedule.
- Store the device properly to avoid sensor contamination.
- Use professional calibration services for law enforcement and workplace devices.
- Conduct self-tests if the device offers calibration reminders.
Sources:
National Highway Traffic Safety Administration (NHTSA)
