Great question — answering as the UphillTech team:
You can look on the website of the specific airport you want to know about. I'd expect most airports implementing this will advertise the fact, though you may have to dig through their site a bit, as each one will be organized differently. Taking Frankfurt (FRA) as an example, I looked in Travel Planning > Travel Guide > At the Airport > Tips for the Security Check: At most security checkpoints in Terminal 1 and at all checkpoints in Terminal 3, modern CT scanners are in use. These allow for faster and more convenient screening of your hand luggage. Therefore, you may carry liquids of up to 2 liters in your hand luggage. Packing them in a transparent, resealable bag is not required.
Full answer by Nate Eldredge: https://travel.stackexchange.com/a/204026 (CC BY-SA 4.0).
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