Every breath analyzer falls into one of two camps based on its sensor: semiconductor (MOS) or electrochemical fuel cell. The choice determines accuracy, cost, lifespan and where the device belongs.
Semiconductor sensors are affordable and fast, making them ideal for personal use and high-volume preliminary screening where a pass/fail indication is enough. They are, however, more prone to interference from substances like acetone and need more frequent recalibration.
Fuel cell sensors react specifically to ethanol, delivering precise, repeatable readings that hold up as evidence. They cost more and are the right call for law enforcement, evidential testing and any situation where a number — not just a colour — decides someone's day.
For most organisations the answer is a mix: semiconductor units for the first screen, fuel cell units for confirmation. AlcoBreath stocks both, and we'll help you draw the line in the right place.