At what level below 20 ppm do you detect gluten? Stacy Boise July 01, 2017 08:04 Follow Based on internal testing, Nima has detected gluten at levels as low as 5 ppm. If Nima detects gluten at any level, the "Gluten Found" message will appear on the device. Visit the Nima store. Related articles What if an item is certified gluten free? What’s Nima's level of detection? Does Nima come with a warranty? Is Nima FDA approved? What is Nima’s level of detection in packaged foods? Comments 0 comments Please sign in to leave a comment.