A gluten test that fits in your palm

A smiley face appears on the screen if the Nima detects less than 20 parts per million of gluten.

A wheat symbol comes up on the Nima's screen if gluten is in your food sample.

The food sample mixes with a solution, and a test strip detects any gluten in the solution. It takes about three minutes.

After you screw the top onto the capsule to grind the food, you put the capsule in the Nima sensor.

To test a dish for gluten, you put a pea-size sample into a capsule.

You can only use Nima capsules once, and they're not recyclable. A Nima subscription for 12 capsules a month costs about $60, or $5 a capsule.

The Nima (left) is a handheld, Bluetooth-connected sensor that analyzes tiny samples of your food to find out if there's any gluten in what you're about to eat. You put food you want to test in a capsule (right), and put the capsule in the sensor.