Alcocat Labs S.L. uses sensors made in Switzerland. To get the right results, each user should calibrate their alcometer after every 300 measurements. The Alcocat app shows a status bar for your next calibration. Clicking on it, you will enter calibration mode and can calibrate the product at any calibration service provider. See the calibration guide here or order calibration service from us:

Thank you! Your message has been sent.
Unable to send your message. Please fix errors then try again.