Yes, a breathalyser can still be calibrated after a long period without calibration, but there are some important points to keep in mind:
- Sensor drift may be significant, which can make the calibration process more difficult.
- If the unit has gone well past its recommended service interval, the accuracy may be unreliable even after calibration.
- In some cases, the sensor may have degraded or failed, meaning the device may need repairs or a sensor replacement rather than just a calibration.
- Andatech recommend regular calibration (every 6–12 months) to ensure accuracy and avoid long-term damage.
- In short: Calibration is usually still possible, but the technician will only know for sure after testing the device. If the sensor is too far out of range, it may require additional servicing.