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 How frequently will you detect gluten below 20 ppm? Does Nima come with a warranty? Is Nima FDA approved? How will I know if the gluten level is less than 20 ppm? What’s Nima's level of detection? Comments 0 comments Please sign in to leave a comment.