A way to detect laughing gas on people’s breath for at least an hour after use could be developed into a breathalyser-like test. As recreational use of laughing gas, or nitrous oxide ...

【User-Friendly Operation】 Just insert the 2* AAA batteries, then need to press the button for seconds to start, and 15 seconds to warm up, then blow to the breathalyzer tester for 3-5s and ...