Are Smartphone-Compatible Breathalysers Reliable?

Smartphone-compatible breathalysers have become a popular tool for individuals looking to monitor their blood alcohol concentration (BAC). These devices, which connect to mobile apps via Bluetooth or a physical attachment, claim to provide instant BAC readings. But how accurate are these devices compared to professional models used by law enforcement?

Factors That Affect Accuracy

The reliability of smartphone-compatible breathalysers depends on several key factors:

Sensor Technology: Devices using fuel cell sensors tend to be more accurate, whereas cheaper semiconductor-based models may produce inconsistent results.

Calibration Requirements: Like professional breathalysers, these devices need regular calibration to maintain accuracy.

Environmental Influences: Temperature, humidity, and air quality can impact readings.

User Errors: Failing to follow instructions, such as waiting after drinking before testing, can lead to false readings.

How Do They Compare to Professional Breathalysers?

High-quality smartphone-compatible breathalysers with fuel cell sensors can offer fairly reliable readings, but they still have a margin of error. Professional breathalysers used by police undergo stringent calibration and testing, making them more accurate. While smartphone models are useful for personal awareness, they should not be relied upon for legal or safety decisions.

Ensuring Accuracy in Smartphone Breathalysers

For those considering a smartphone-compatible breathalyser, checking for independent certifications and lab testing is essential. Choosing a model with a fuel cell sensor and following proper usage guidelines can improve accuracy.

Sources:

Australian Government 
National Road Safety Partnership Program