[crote]

Why would a certified calibrated breathalizer test be inadmissible in court? How is it any different from catching speeders with a laser gun, or doing a DNA test?

And if giving every cop a calibrated breathalizer is too expensive: give them a reasonably-accurate one for in the field, then take everyone who fails it to the station for a retest on an expensive calibrated one.

[Atotalnoob]

That’s what they do. The field one is inadmissible, but justifies arresting and transporting to the admissible one at the station