The Welsh festival is the first in the UK to fully trial wristbands with an Oyster Card-style microchip.
The devices had been used on a very small number of music fans at the Isle Of Wight Festival and a Red Hot Chili Peppers gig at Knebworth, but this is the first time every attendee had been required to wear an electronic wristband.
The designers claim that the technology will cut out fake tickets and queues, as festival-goers are scanned in and out of areas at the site. The wristbands can also be pre-loaded with money to pay for food and drink.
Fitted with an RFID (radio frequency identification) microchip - the same technology used in Oyster Cards - the bands can be cancelled if lost or stolen.
Organisers at the event, which this year was headlined by Calvin Harris, Dizzee Rascal and Ed Sheeran, are also able to use the data from the microchips to monitor how many of the 15,000 festival-goers are onsite at any one time.
Want to receive up-to-the-minute tech news straight to your inbox? Then click here to sign up for the completely free PCR Daily Digest and Newsflash email services. You can also follow PCR on Twitter and Facebook.