Conclusive breath alcohol testing in New Zealand: results obtained using Intoxilyzer 5000 devices.

Intoxilyzer 5000 Conclusive Breath Testing Devices have been in wide operational use in New Zealand since June 1989. From the monitoring of these devices, large number of duplicate subject test results and blood alcohol/breath alcohol pairs have been obtained. Information on the agreement between duplicate subject breath samples, the blood/breath correlation, and the distribution of breath alcohol levels encountered at each testing location will be presented. Each device has been closely monitored in the field with respect to its calibration status and stability; the devices have proved to be very satisfactory in the field.