How often does a breathalyser need calibration?

How often a breathalyser needs calibration depends on the model, sensor technology and how much it is used.

Many breathalysers with fuel-cell sensors need calibration approximately every 6–12 months or after a certain number of tests.

However, some models have different intervals, so the manufacturer’s recommendations must always be followed.

Why does a breathalyser need calibration?

The sensor’s readings may change over time.

Calibration involves checking the device and, if needed, adjusting it against a known alcohol concentration to ensure it measures within the specified tolerances.

What happens if I do not calibrate it?

A breathalyser that has not been calibrated according to the manufacturer’s instructions may give less reliable results.

For example, it may show a reading that is too high or too low.

Some models display a reminder when calibration is due. Others may need to be checked manually.

How do I know when my breathalyser needs calibration?

Check the product’s manual or the manufacturer’s specifications.

These usually state the recommended calibration interval and how calibration should be carried out.

If you are unsure what applies to your model, contact our customer service team with the product’s model designation.