Approved screening device
A small portable device to determine a blood alcohol concentration range of a suspected drinking driver at the roadside. Usually the device uses the electrochemical (EC) method of detection.
Source

Title: The Lawyer’s Guide to the Forensic Sciences
By: Edited by Caitlin Pakosh
One of a listed number of devices for the testing of breath to screen for the quantity, if any, of alcohol in a person’s blood as prescribed by regulation made pursuant to the Criminal Code of Canada, i.e., Dräger Alcotest 7410 GLC.
Source

Title: Drug-Impaired Driving in Canada
By: Nathan Baker