The AlcoDigital AL7000 breathalyzer is the most accurate semi-conductor device in our range of personal digital breathalysers. It has a replaceable swap & go sensor, therefore does not require sending away for calibration. Simply purchase a new sensor and change it over yourself every 12 months – just like a battery. The AlcoDigital AL7000 sensor measures alcohol in milligrams per litre (mg/L) of breath and provides measurements up to 2.00mg/L. The Al7000 is also the only semi-conductor breathalyser to come with a hard case and in car power supply.