New rules at Dublin Airport mean that passengers will no longer have to take liquids, gels and electronic items out of their hand luggage when passing through security.
The 100ml restriction on liquids and gels is also being relaxed, increasing to two litres, with no limit on the number of items that can be carried.
The changes will take effect from midnight.
As part of the move, liquids and gels will no longer need to be in clear plastic bags.
Daa, which runs Dublin Airport, said that it is the result of a multi-million euro upgrade of its scanning technology.
Thirty new C3 scanners, which make it easier to detect what is inside passengers’ bags, have been rolled out in both terminals.
The scanners work by generating 3D images of the luggage and have been compared to CT scanners in hospitals.
Daa described it as the "best threat detection technology" available and said its introduction has been achieved ahead of a regulatory deadline of the end of this year.
Head of Communications Graeme McQueen said the changes are good news for passengers, as they will make the experience of going through security safer, smoother and quicker.
"The level of detail that our scanners are able to see through these machines is really, really high," he said.
"They can spot a troublesome liquid much easier. This is the safest technology available.
"This is what airports are moving to all around the world, and here at Dublin Airport, we're one of the first major airports in Europe to be fully C3 and that's great news for passengers travelling," Mr McQueen said.
Daa said the rollout took around three years to implement and involved a "substantial financial investment".
Passengers flying into Dublin are still being advised to check the liquid rules at the airport from which they are departing.
Dublin Airport rule changes at a glance:
What's changed?
- Liquids, gels and electronics can stay in hand luggage when going through security.
- There is no limit on the number of liquids and gels that can be carried in hand luggage.
- The previous 100ml maximum limit on liquids and gels no longer applies and items of up to two litres can be carried.
- Liquids and gels no longer need to be packed in clear plastic bags.
What's staying the same?
- Items such as belts, footwear which extends over the ankle, jackets, hoodies and oversized
- Jumpers and cardigans must be removed and placed in security trays.
- Passengers must continue to remove all items from their pockets, including keys, wallets and phones.
Daa, which also runs Cork Airport, said that work will start there later this month to introduce the new scanners.
The 100ml rules were introduced in 2006 as part of increased security measures at airports around the world.
Other security screening measures remain in place.
Items such as belts, boots, jackets and hoodies must be removed and placed in trays.
Passengers must also take all items out of their pockets.
