• When do I need to calibrate my breathalyzer?
  • If your unit is showing inconsistent results, unusually high or low readings, or not showing any results, it is time for calibration.
  • If your unit is slower to load or reset between uses, or is showing an error message, it might be time to recalibrate.
  • If a test subject ate or drank within 15 minutes of testing, immediate calibration is required. Food and drink can damage the sensor.
  • Semi-conductor models will require calibration every month if you use your unit daily, twice a year if you use it a few times a month.
  • Fuel cell models should be calibrated at least once a year.
• How can I get my unit calibrated?
  • If you have purchased a calibration with us, you can call us or contact us through this portal, and someone with respond to setup your calibration
  • If you are interested in purchasing a calibration, please visit our site to buy a calibration and learn more 
• Why does Quest not offer replacement sensor modules instead of calibration?
  • Quest’s trained technicians perform a full diagnostic check on all aspects of the unit as part of the routine calibration process. Thus, the calibration process offered by Quest is more than simple calibration. Quest technicians test all aspects. Also, it is our opinion that a user will not know if the replacement module is accurate or out of calibration itself. Finally, the cost of the replacement module is more than the full diagnostic process that Quest provides.