Breathalyser accuracy

[DHA]

Hi,

If anyone can help I would be interested in some info on the accuracy of breathalysers. I know the legal limit for drink driving is 35µg per 100ml but the Railways and Transport Safety Act 2003 has it at 9µg per 100ml. Are breathalysers accurate enough down to this level?

Cheers

[Dibble]

I'm not sure; I think a screening breath test is done, but the actual evidential sample is blood or urine.

[DHA]

Yeah, I would expect a follow up if breath is failed.

[insanojackson]

there 95% accurate well the one where i work has a sticker on it saying so. the margin of error is dealt with by the general policy that if you blow less than 40 no action is taken. then between 40 and 50 the punter is given what called "the statuatory option" where they can elect whether to stick with the reading or to go for a blood sample.