Sensor Module for AL3100 or AL3500SC Breathalyzers
Sensor module for the AL3100 or AL3500SC (semiconductor) models ONLY.
IMPORTANT: Your current sensor module MUST appear IDENTICAL to the one pictured on this page; if otherwise, it will NOT be compatible with your machine.
These sensor modules must be replaced approx. every 400 tests or at least once per year, whichever comes first.