"Unfortunately, there are still a number of meters on the Swedish market that are totally useless for measuring blood alcohol content," says Tomas Jonsson, who is CEO of MHF Test Lab.

One of the alcohol meters for home use that Testfakta examined is Sencor, which until recently was sold on Elgiganten's digital marketplace.

It is incorrectly calibrated from the factory and shows completely incorrect values.

The chain has now stopped selling the product.

Sayna Oveisikian, communications manager at Elgiganten, tells SVT Nyheter that the product was not sold in stores but via Elgiganten Marketplace, where other players can sell products in collaboration with Elgigaten.

- We have routines for quality control and do random samples, but sometimes there are deviations.

We removed it immediately when we found out that it was a substandard product, says Sayna Oveisikian, who currently cannot answer how many copies of the current alcohol meter were sold.

Must be calibrated

Several alcohol meters for home use that are on the market are judged to be unreliable in the test.

Other meters in the test gave better results, the test winner Dräger 4,000 showed 0.21 per mille content when simulated breathing air of 0.2 per mille was blown out.

However, most meters need to be recalibrated after being used for a while - otherwise there is a risk that they will show incorrect values.

- We recommend that you submit the alcohol meter for calibration once a year.

Otherwise, the risk is high for incorrect measurement values, says Tomas Jonsson at MHF Test Lab.