Rinse them as they are only plastic straws.

You can buy more.

There are about six in the box.

They're plastic tubes so can be washed out. But after 5 uses or so you shoudl probably replace the tube. You can get spare packs of 20 online at Halfords.com

just rinse them under water, cos I have found alc can stick to the inside and give a higher reading

they are removeable so under the tap

They can be washed, but beware of contaminating them

Yes you can switch quite easily

You can choose which mode you want on the unit itself. It comes out the box in BAC mode.

you can change yourself at any time

yes you can change yourself

Mine came with %BAC (blood alcohol). I think they all do. The units are fixed, and this is what the police ones use. I looked up on wikipedia what BAC equivalents are in terms of drinks and the instructions also explain the legal limit for driving.

Yes, they are just plastic straws.

You can buy more.

About 6 come in the box.

YEs

yes, they are just straws that you could buy anywhere, they just need to be about the right diameter. You get 5 with it, and you can wash them.

They are straws, same diameter size as MacDonalds, KFC etc so just collect some of those and cut with a scissors. Or with originals you can just wash them out and let them dry.

It selfs cleans and you calbrate by dousing a reader with a mix of wine & water to ensure it has a base level.

It is already calobrated by the manufacturer.

It can also be sent back to them for calobration, but there is a charge.

There is an ASC function that they suggest you run every week, if little use, what this does is clean the sensor ie removes any contaminates. The guide with the unit is comprehensive easy to understand and suggest recalibration every year. Have a look at theirWEB site and you can read all the guides.

It must be sent to a professional recalibration company

You calobrate it yourself by mixing wine with water and dousing the sensor.

You can alos send it back to the manufacturer but there is a charge.

Yes - as with all breathalysers, except those which have a replaceable pre-calibrated sensor, such as the AL7000

Yes - as the results are numeric and if you know the maximum levels you can compare the two.

The AlcoSense Singles NF are NF approved for use in France. The AlcoSense Elite is not NF approved as it is set to work with the UK limits which are higher than the French ones. However, what I did was buy the AlcoSense Singles from here and the Elite. I keep the singles in the car to comply with the new French law, but use the Elite to check myself so I don't have to keep on buying the AlcoSense singles tubes. The alcosense elite still gives you an accurate reading, just that even when you're in france it will only say don't drive if your over the UK limit of 0.8 not the french 0.5 limit.

You can read either micro grams/litre of blood or % Blood Alcohol Concentration. The ratio between blood alcohol levels and breath alcohol levels is a fixed value and therefore a conversion between the breath levels to blood levels can easily and reliably be done.