The CA9000® Professional SG is a personal & professional use alcohol tester with extremely high-reliability. It is the perfect choice for anyone - from individuals and businesses to professional groups. The CA9000® Professional can be used in hospitals, schools and many other industrial fields. It measures estimated B.A.C (Blood Alcohol Content) in human breath by means of a fuel cell sensor which is high durable and providing accurate breath alcohol results up to 4.00‰. It can display the breath alcohol reading in any of the commonly used units of measurement e.g. ‰ promile, mg/L, %BAC, mg/100ml, µg/L*. The CA9000® Professional SG offers not only high accuracy but also reliability and stability over a long period. The long term stability of the sensor means you can count on accurate results year after year**. The tester is equipped with an advance temperature function to help you operate it in an optimal temperature range (0Â° - 40Â°C).